Align base::hash_map with C++11, part 2.

base/files/file_path.h

Index: base/files/file_path.h
diff --git a/base/files/file_path.h b/base/files/file_path.h
index 008b9f5afc67d83db10decbcc9447723da40fbdd..ad42b9549275c706b677e78ecc49531c680a4dd9 100644
--- a/base/files/file_path.h
+++ b/base/files/file_path.h
@@ -107,7 +107,6 @@
 #include <vector>
 
 #include "base/base_export.h"
-#include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_piece.h"  // For implicit conversions.
@@ -453,7 +452,6 @@ BASE_EXPORT extern void PrintTo(const base::FilePath& path, std::ostream* out);
 // Provide a hash function so that hash_sets and maps can contain FilePath
 // objects.
 namespace BASE_HASH_NAMESPACE {
-#if defined(COMPILER_GCC)
 
 template<>
 struct hash<base::FilePath> {
@@ -462,14 +460,6 @@ struct hash<base::FilePath> {
   }
 };
 
-#elif defined(COMPILER_MSVC)
-
-inline size_t hash_value(const base::FilePath& f) {
-  return hash_value(f.value());
-}
-
-#endif  // COMPILER
-
 }  // namespace BASE_HASH_NAMESPACE
 
 #endif  // BASE_FILES_FILE_PATH_H_