SkBitmap and SkPixelRef no longer need lock/unlock

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_policy_browsertest.cc

 // Copyright 2014 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 <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
@@ skipping 84 matching lines @@
   }
   if (bitmap.isNull()) {
     ADD_FAILURE() << "Bitmap has no pixelref.";
     return SkColorSetARGB(0, 0, 0, 0);
   }
   if (bitmap.colorType() == kUnknown_SkColorType) {
     ADD_FAILURE() << "Bitmap has not been configured.";
     return SkColorSetARGB(0, 0, 0, 0);
   }
   uint64_t a = 0, r = 0, g = 0, b = 0;
-  bitmap.lockPixels();
   for (int x = 0; x < bitmap.width(); ++x) {
     for (int y = 0; y < bitmap.height(); ++y) {
       const SkColor color = bitmap.getColor(x, y);
       a += SkColorGetA(color);
       r += SkColorGetR(color);
       g += SkColorGetG(color);
       b += SkColorGetB(color);
     }
   }
-  bitmap.unlockPixels();
   uint64_t pixel_number = bitmap.width() * bitmap.height();
   return SkColorSetARGB((a + pixel_number / 2) / pixel_number,
                         (r + pixel_number / 2) / pixel_number,
                         (g + pixel_number / 2) / pixel_number,
                         (b + pixel_number / 2) / pixel_number);
 }
 
 // Obtain wallpaper image and return its average ARGB color.
 SkColor GetAverageWallpaperColor() {
   const gfx::ImageSkia image =
@@ skipping 311 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, PersistOverLogout) {
   LoginUser(testUsers_[0].GetUserEmail());
 
   // Wait until wallpaper has been loaded.
   RunUntilWallpaperChangeCount(1);
   ASSERT_EQ(kRedImageColor, GetAverageWallpaperColor());
 }
 
 }  // namespace chromeos