Revert "[clang-tidy] Fix relative path in header-filter."

This reverts commit r372388. It made '-header-filter' inconsistent with
paths printed in diagnostics.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@372601 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/clang-tidy/ClangTidyDiagnosticConsumer.cpp b/clang-tidy/ClangTidyDiagnosticConsumer.cpp
index 0f311ff..2889198 100644
--- a/clang-tidy/ClangTidyDiagnosticConsumer.cpp
+++ b/clang-tidy/ClangTidyDiagnosticConsumer.cpp
@@ -551,9 +551,7 @@
     return;
   }
 
-  StringRef FileName = File->tryGetRealPathName();
-  if (FileName.empty())
-    FileName = File->getName();
+  StringRef FileName(File->getName());
   LastErrorRelatesToUserCode = LastErrorRelatesToUserCode ||
                                Sources.isInMainFile(Location) ||
                                getHeaderFilter()->match(FileName);
diff --git a/test/clang-tidy/Inputs/file-filter/subfolder_a/header_a.h b/test/clang-tidy/Inputs/file-filter/subfolder_a/header_a.h
deleted file mode 100644
index 814c343..0000000
--- a/test/clang-tidy/Inputs/file-filter/subfolder_a/header_a.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#include "../subfolder_b/header_b.h"
-
-class SA { SA(int); };
diff --git a/test/clang-tidy/Inputs/file-filter/subfolder_b/header_b.h b/test/clang-tidy/Inputs/file-filter/subfolder_b/header_b.h
deleted file mode 100644
index d07d3c0..0000000
--- a/test/clang-tidy/Inputs/file-filter/subfolder_b/header_b.h
+++ /dev/null
@@ -1 +0,0 @@
-class SB { SB(int); };
diff --git a/test/clang-tidy/Inputs/file-filter/subfolder_c/header_c.h b/test/clang-tidy/Inputs/file-filter/subfolder_c/header_c.h
deleted file mode 100644
index dda5c57..0000000
--- a/test/clang-tidy/Inputs/file-filter/subfolder_c/header_c.h
+++ /dev/null
@@ -1 +0,0 @@
-class SC { SC(int); };
diff --git a/test/clang-tidy/file-filter.cpp b/test/clang-tidy/file-filter.cpp
index 9473417..9ee5cad 100644
--- a/test/clang-tidy/file-filter.cpp
+++ b/test/clang-tidy/file-filter.cpp
@@ -9,12 +9,6 @@
 //       file-filter\header*.h due to code order between '/' and '\\'.
 // RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='.*' -system-headers %s -- -I %S/Inputs/file-filter/system/.. -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK4 %s
 // RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='.*' -system-headers -quiet %s -- -I %S/Inputs/file-filter/system/.. -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK4-QUIET %s
-// RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='subfolder_a' %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK5 %s
-// RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='subfolder_a' -quiet %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK5-QUIET %s
-// RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='subfolder_b' %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK6 %s
-// RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='subfolder_b' -quiet %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK6-QUIET %s
-// RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='subfolder_c' %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK7 %s
-// RUN: clang-tidy -checks='-*,google-explicit-constructor' -header-filter='subfolder_c' -quiet %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK7-QUIET %s
 
 #include "header1.h"
 // CHECK-NOT: warning:
@@ -25,12 +19,6 @@
 // CHECK3-QUIET-NOT: warning:
 // CHECK4: header1.h:1:12: warning: single-argument constructors
 // CHECK4-QUIET: header1.h:1:12: warning: single-argument constructors
-// CHECK5-NOT: warning:
-// CHECK5-QUIET-NOT: warning:
-// CHECK6-NOT: warning:
-// CHECK6-QUIET-NOT: warning:
-// CHECK7-NOT: warning:
-// CHECK7-QUIET-NOT: warning:
 
 #include "header2.h"
 // CHECK-NOT: warning:
@@ -41,44 +29,6 @@
 // CHECK3-QUIET: header2.h:1:12: warning: single-argument constructors
 // CHECK4: header2.h:1:12: warning: single-argument constructors
 // CHECK4-QUIET: header2.h:1:12: warning: single-argument constructors
-// CHECK5-NOT: warning:
-// CHECK5-QUIET-NOT: warning:
-// CHECK6-NOT: warning:
-// CHECK6-QUIET-NOT: warning:
-// CHECK7-NOT: warning:
-// CHECK7-QUIET-NOT: warning:
-
-#include "subfolder_a/header_a.h"
-// CHECK-NOT: warning:
-// CHECK-QUIET-NOT: warning:
-// CHECK2: header_b.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK2-QUIET: header_b.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK3-NOT: warning:
-// CHECK3-QUIET-NOT: warning:
-// CHECK4: header_b.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK4-QUIET: header_b.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK5: header_a.h:3:12: warning: single-argument constructors must be marked explicit
-// CHECK5-QUIET: header_a.h:3:12: warning: single-argument constructors must be marked explicit
-// CHECK6: header_b.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK6-QUIET: header_b.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK7-NOT: warning:
-// CHECK7-QUIET-NOT: warning:
-
-#include "subfolder_c/header_c.h"
-// CHECK-NOT: warning:
-// CHECK-QUIET-NOT: warning:
-// CHECK2: header_c.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK2-QUIET: header_c.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK3-NOT: warning:
-// CHECK3-QUIET-NOT: warning:
-// CHECK4: header_c.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK4-QUIET: header_c.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK5-NOT: warning:
-// CHECK5-QUIET-NOT: warning:
-// CHECK6-NOT: warning:
-// CHECK6-QUIET-NOT: warning:
-// CHECK7: header_c.h:1:12: warning: single-argument constructors must be marked explicit
-// CHECK7-QUIET: header_c.h:1:12: warning: single-argument constructors must be marked explicit
 
 #include <system-header.h>
 // CHECK-NOT: warning:
@@ -89,12 +39,6 @@
 // CHECK3-QUIET-NOT: warning:
 // CHECK4: system-header.h:1:12: warning: single-argument constructors
 // CHECK4-QUIET: system-header.h:1:12: warning: single-argument constructors
-// CHECK5-NOT: warning:
-// CHECK5-QUIET-NOT: warning:
-// CHECK6-NOT: warning:
-// CHECK6-QUIET-NOT: warning:
-// CHECK7-NOT: warning:
-// CHECK7-QUIET-NOT: warning:
 
 class A { A(int); };
 // CHECK: :[[@LINE-1]]:11: warning: single-argument constructors
@@ -105,12 +49,6 @@
 // CHECK3-QUIET: :[[@LINE-6]]:11: warning: single-argument constructors
 // CHECK4: :[[@LINE-7]]:11: warning: single-argument constructors
 // CHECK4-QUIET: :[[@LINE-8]]:11: warning: single-argument constructors
-// CHECK5: :[[@LINE-9]]:11: warning: single-argument constructors
-// CHECK5-QUIET: :[[@LINE-10]]:11: warning: single-argument constructors
-// CHECK6: :[[@LINE-11]]:11: warning: single-argument constructors
-// CHECK6-QUIET: :[[@LINE-12]]:11: warning: single-argument constructors
-// CHECK7: :[[@LINE-13]]:11: warning: single-argument constructors
-// CHECK7-QUIET: :[[@LINE-14]]:11: warning: single-argument constructors
 
 // CHECK-NOT: warning:
 // CHECK-QUIET-NOT: warning:
@@ -120,31 +58,16 @@
 // CHECK3-QUIET-NOT: warning:
 // CHECK4-NOT: warning:
 // CHECK4-QUIET-NOT: warning:
-// CHECK5-NOT: warning:
-// CHECK5-QUIET-NOT: warning:
-// CHECK6-NOT: warning:
-// CHECK6-QUIET-NOT: warning:
-// CHECK7-NOT: warning:
-// CHECK7-QUIET-NOT: warning:
 
-// CHECK: Suppressed 6 warnings (6 in non-user code)
+// CHECK: Suppressed 3 warnings (3 in non-user code)
 // CHECK: Use -header-filter=.* to display errors from all non-system headers.
 // CHECK-QUIET-NOT: Suppressed
 // CHECK2: Suppressed 1 warnings (1 in non-user code)
 // CHECK2: Use -header-filter=.* {{.*}}
 // CHECK2-QUIET-NOT: Suppressed
-// CHECK3: Suppressed 5 warnings (5 in non-user code)
+// CHECK3: Suppressed 2 warnings (2 in non-user code)
 // CHECK3: Use -header-filter=.* {{.*}}
 // CHECK3-QUIET-NOT: Suppressed
 // CHECK4-NOT: Suppressed {{.*}} warnings
 // CHECK4-NOT: Use -header-filter=.* {{.*}}
 // CHECK4-QUIET-NOT: Suppressed
-// CHECK5: Suppressed 5 warnings (5 in non-user code)
-// CHECK5: Use -header-filter=.* to display errors from all non-system headers.
-// CHECK5-QUIET-NOT: Suppressed
-// CHECK6: Suppressed 5 warnings (5 in non-user code)
-// CHECK6: Use -header-filter=.* to display errors from all non-system headers.
-// CHECK6-QUIET-NOT: Suppressed
-// CHECK7: Suppressed 5 warnings (5 in non-user code)
-// CHECK7: Use -header-filter=.* to display errors from all non-system headers.
-// CHECK7-QUIET-NOT: Suppressed