Revert of Fix for the font files being maped multiple times (Fontconfig).

content/common/font_config_ipc_linux.h

Index: content/common/font_config_ipc_linux.h
diff --git a/content/common/font_config_ipc_linux.h b/content/common/font_config_ipc_linux.h
index 0449934f395b6661bd2e1d1ae91c91a4131af4b5..c5cf80f72744dac30632e84bd43563e9fa94472d 100644
--- a/content/common/font_config_ipc_linux.h
+++ b/content/common/font_config_ipc_linux.h
@@ -6,8 +6,6 @@
 #define CONTENT_COMMON_FONT_CONFIG_IPC_LINUX_H_
 
 #include "base/compiler_specific.h"
-#include "base/containers/hash_tables.h"
-#include "base/synchronization/lock.h"
 #include "third_party/skia/include/ports/SkFontConfigInterface.h"
 
 #include <string>
@@ -39,18 +37,7 @@
   };
 
  private:
-  class MappedFontFile;
-
-  // Removes |mapped_font_file| from |mapped_font_files_|.
-  // Does not delete the passed-in object.
-  void RemoveMappedFontFile(MappedFontFile* mapped_font_file);
-
   const int fd_;
-  // Lock preventing multiple threads from opening font file and accessing
-  // |mapped_font_files_| map at the same time.
-  base::Lock lock_;
-  // Maps font identity ID to the memory-mapped file with font data.
-  base::hash_map<uint32_t, MappedFontFile*> mapped_font_files_;
 };
 
 }  // namespace content