SkBitmap and SkPixelRef no longer need lock/unlock

cc/resources/ui_resource_bitmap.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/ui_resource_bitmap.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 71 matching lines @@
 }
 
 UIResourceBitmap::UIResourceBitmap(sk_sp<SkPixelRef> pixel_ref,
                                    const gfx::Size& size) {
   Create(std::move(pixel_ref), size, UIResourceBitmap::ETC1);
 }
 
 UIResourceBitmap::UIResourceBitmap(const UIResourceBitmap& other) = default;
 
 UIResourceBitmap::~UIResourceBitmap() {}
-
-AutoLockUIResourceBitmap::AutoLockUIResourceBitmap(
-    const UIResourceBitmap& bitmap) : bitmap_(bitmap) {
-  bitmap_.pixel_ref_->lockPixels();
-}
-
-AutoLockUIResourceBitmap::~AutoLockUIResourceBitmap() {
-  bitmap_.pixel_ref_->unlockPixels();
-}
-
-const uint8_t* AutoLockUIResourceBitmap::GetPixels() const {
-  return static_cast<const uint8_t*>(bitmap_.pixel_ref_->pixels());
-}
-
 }  // namespace cc