SkBitmap and SkPixelRef no longer need lock/unlock

chrome/renderer/chrome_render_frame_observer.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 "chrome/renderer/chrome_render_frame_observer.h"
 
 #include <stddef.h>
 #include <string.h>
 
 #include <limits>
@@ skipping 191 matching lines @@
                           thumbnail_max_size_pixels);
   }
 
   SkBitmap bitmap;
   if (thumbnail.colorType() == kN32_SkColorType)
     bitmap = thumbnail;
   else
     thumbnail.copyTo(&bitmap, kN32_SkColorType);
 
   std::vector<uint8_t> thumbnail_data;
-  SkAutoLockPixels lock(bitmap);
   if (bitmap.getPixels()) {
     const int kDefaultQuality = 90;
     std::vector<unsigned char> data;
     if (gfx::JPEGCodec::Encode(
             reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
             gfx::JPEGCodec::FORMAT_SkBitmap, bitmap.width(), bitmap.height(),
             static_cast<int>(bitmap.rowBytes()), kDefaultQuality, &data)) {
       thumbnail_data.swap(data);
     }
   }
@@ skipping 137 matching lines @@
 
 void ChromeRenderFrameObserver::OnImageContextMenuRendererRequest(
     chrome::mojom::ImageContextMenuRendererRequest request) {
   image_context_menu_renderer_bindings_.AddBinding(this, std::move(request));
 }
 
 void ChromeRenderFrameObserver::OnThumbnailCapturerRequest(
     chrome::mojom::ThumbnailCapturerRequest request) {
   thumbnail_capturer_bindings_.AddBinding(this, std::move(request));
 }