Rename the shared_impl resource files to give them more regular names.

ppapi/shared_impl/image_data_impl.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ppapi/shared_impl/image_data_impl.h"
-
-#include "third_party/skia/include/core/SkTypes.h"
-
-namespace ppapi {
-
-// static
-PP_ImageDataFormat ImageDataImpl::GetNativeImageDataFormat() {
-  if (SK_B32_SHIFT == 0)
-    return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
-  else if (SK_R32_SHIFT == 0)
-    return PP_IMAGEDATAFORMAT_RGBA_PREMUL;
-  else
-    return PP_IMAGEDATAFORMAT_BGRA_PREMUL;  // Default to something on failure.
-}
-
-// static
-bool ImageDataImpl::IsImageDataFormatSupported(PP_ImageDataFormat format) {
-  return format == PP_IMAGEDATAFORMAT_BGRA_PREMUL ||
-         format == PP_IMAGEDATAFORMAT_RGBA_PREMUL;
-}
-
-}  // namespace ppapi