Cleanup: Remove using statements from webkit/fileapi header files.

webkit/fileapi/file_system_file_util.h

Index: webkit/fileapi/file_system_file_util.h
===================================================================
--- webkit/fileapi/file_system_file_util.h	(revision 174833)
+++ webkit/fileapi/file_system_file_util.h	(working copy)
@@ -6,8 +6,6 @@
 #define WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_H_
 
 #include "base/file_path.h"
-#include "base/file_util_proxy.h"
-#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
 #include "webkit/fileapi/file_system_url.h"
@@ -23,8 +21,6 @@
 
 namespace fileapi {
 
-using base::PlatformFile;
-using base::PlatformFileError;
 class FileSystemOperationContext;
 
 // A file utility interface that provides basic file utility methods for
@@ -74,17 +70,17 @@
   // If PLATFORM_FILE_CREATE is set in |file_flags| it always tries to create
   // a new file at the given |url| and calls back with
   // PLATFORM_FILE_ERROR_FILE_EXISTS if the |url| already exists.
-  virtual PlatformFileError CreateOrOpen(
+  virtual base::PlatformFileError CreateOrOpen(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       int file_flags,
-      PlatformFile* file_handle,
+      base::PlatformFile* file_handle,
       bool* created) = 0;
 
   // Closes the given file handle.
-  virtual PlatformFileError Close(
+  virtual base::PlatformFileError Close(
       FileSystemOperationContext* context,
-      PlatformFile file) = 0;
+      base::PlatformFile file) = 0;
 
   // Ensures that the given |url| exist.  This creates a empty new file
   // at |url| if the |url| does not exist.
@@ -95,20 +91,20 @@
   // is set PLATFORM_FILE_OK.
   // If the file hasn't existed but it couldn't be created for some other
   // reasons, |created| is set false and |error code| indicates the error.
-  virtual PlatformFileError EnsureFileExists(
+  virtual base::PlatformFileError EnsureFileExists(
       FileSystemOperationContext* context,
       const FileSystemURL& url, bool* created) = 0;
 
   // Creates directory at given url. It's an error to create
   // if |exclusive| is true and dir already exists.
-  virtual PlatformFileError CreateDirectory(
+  virtual base::PlatformFileError CreateDirectory(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       bool exclusive,
       bool recursive) = 0;
 
   // Retrieves the information about a file.
-  virtual PlatformFileError GetFileInfo(
+  virtual base::PlatformFileError GetFileInfo(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       base::PlatformFileInfo* file_info,
@@ -129,7 +125,7 @@
   // Maps |file_system_url| given |context| into |local_file_path|
   // which represents physical file location on the host OS.
   // This may not always make sense for all subclasses.
-  virtual PlatformFileError GetLocalFilePath(
+  virtual base::PlatformFileError GetLocalFilePath(
       FileSystemOperationContext* context,
       const FileSystemURL& file_system_url,
       FilePath* local_file_path) = 0;
@@ -137,7 +133,7 @@
   // Updates the file metadata information.  Unlike posix's touch, it does
   // not create a file even if |url| does not exist, but instead fails
   // with PLATFORM_FILE_ERROR_NOT_FOUND.
-  virtual PlatformFileError Touch(
+  virtual base::PlatformFileError Touch(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       const base::Time& last_access_time,
@@ -145,7 +141,7 @@
 
   // Truncates a file to the given length.  If |length| is greater than the
   // current length of the file, the file will be extended with zeroes.
-  virtual PlatformFileError Truncate(
+  virtual base::PlatformFileError Truncate(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       int64 length) = 0;
@@ -156,27 +152,27 @@
       const FileSystemURL& url) = 0;
 
   // Copies or moves a single file from |src_url| to |dest_url|.
-  virtual PlatformFileError CopyOrMoveFile(
+  virtual base::PlatformFileError CopyOrMoveFile(
       FileSystemOperationContext* context,
       const FileSystemURL& src_url,
       const FileSystemURL& dest_url,
       bool copy) = 0;
 
   // Copies in a single file from a different filesystem.
-  virtual PlatformFileError CopyInForeignFile(
+  virtual base::PlatformFileError CopyInForeignFile(
         FileSystemOperationContext* context,
         const FilePath& src_file_path,
         const FileSystemURL& dest_url) = 0;
 
   // Deletes a single file.
   // It assumes the given url points a file.
-  virtual PlatformFileError DeleteFile(
+  virtual base::PlatformFileError DeleteFile(
       FileSystemOperationContext* context,
       const FileSystemURL& url) = 0;
 
   // Deletes a single empty directory.
   // It assumes the given url points an empty directory.
-  virtual PlatformFileError DeleteSingleDirectory(
+  virtual base::PlatformFileError DeleteSingleDirectory(
       FileSystemOperationContext* context,
       const FileSystemURL& url) = 0;