replace etc1_pixel_ref with skia version (SkMallocPixelRef)

cc/resources/etc1_pixel_ref.cc

-// Copyright 2013 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 "cc/resources/etc1_pixel_ref.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "third_party/skia/include/core/SkPixelRef.h"
-
-namespace cc {
-
-// Takes ownership of pixels.
-ETC1PixelRef::ETC1PixelRef(const SkImageInfo& info,
-                           size_t rowBytes,
-                           scoped_ptr<uint8_t[]> pixels)
-    : SkPixelRef(info), rowBytes_(rowBytes), pixels_(pixels.Pass()) {
-  setImmutable();
-}
-
-ETC1PixelRef::~ETC1PixelRef() {}
-
-#ifdef SK_SUPPORT_LEGACY_ONLOCKPIXELS
-void* ETC1PixelRef::onLockPixels(SkColorTable** color_table) {
-  *color_table = NULL;
-  return static_cast<void*>(pixels_.get());
-}
-#endif
-
-bool ETC1PixelRef::onNewLockPixels(LockRec* rec) {
-  if (pixels_.get()) {
-    rec->fPixels = pixels_.get();
-    rec->fColorTable = NULL;
-    rec->fRowBytes = rowBytes_;
-    return true;
-  }
-  return false;
-}
-
-void ETC1PixelRef::onUnlockPixels() {}
-
-SkFlattenable::Factory ETC1PixelRef::getFactory() const { return NULL; }
-
-}  // namespace cc