SkBitmap and SkPixelRef no longer need lock/unlock

ui/compositor/layer_unittest.cc

Index: ui/compositor/layer_unittest.cc
diff --git a/ui/compositor/layer_unittest.cc b/ui/compositor/layer_unittest.cc
index 0783ff05ba7638b7d8d2c56af285a0dfeb53479b..f5eb9d27a68423415a70fc6f07a959b33d96aa0f 100644
--- a/ui/compositor/layer_unittest.cc
+++ b/ui/compositor/layer_unittest.cc
@@ -1183,7 +1183,6 @@ TEST_F(LayerWithRealCompositorTest, DrawPixels) {
   ReadPixels(&bitmap, gfx::Rect(viewport_size));
   ASSERT_FALSE(bitmap.empty());
 
-  SkAutoLockPixels lock(bitmap);
   for (int x = 0; x < viewport_size.width(); x++) {
     for (int y = 0; y < viewport_size.height(); y++) {
       SkColor actual_color = bitmap.getColor(x, y);
@@ -1221,7 +1220,6 @@ TEST_F(LayerWithRealCompositorTest, DrawAlphaBlendedPixels) {
   ReadPixels(&bitmap, gfx::Rect(viewport_size));
   ASSERT_FALSE(bitmap.empty());
 
-  SkAutoLockPixels lock(bitmap);
   for (int x = 0; x < test_size; x++) {
     for (int y = 0; y < test_size; y++) {
       SkColor actual_color = bitmap.getColor(x, y);
@@ -1262,7 +1260,6 @@ TEST_F(LayerWithRealCompositorTest, DrawAlphaThresholdFilterPixels) {
   ReadPixels(&bitmap, gfx::Rect(viewport_size));
   ASSERT_FALSE(bitmap.empty());
 
-  SkAutoLockPixels lock(bitmap);
   for (int x = 0; x < test_size; x++) {
     for (int y = 0; y < test_size; y++) {
       SkColor actual_color = bitmap.getColor(x, y);