SkBitmap and SkPixelRef no longer need lock/unlock

ui/gfx/color_analysis_unittest.cc

Index: ui/gfx/color_analysis_unittest.cc
diff --git a/ui/gfx/color_analysis_unittest.cc b/ui/gfx/color_analysis_unittest.cc
index 32444dbc9fe9afbc31b04f1a4dc16c22c487e3d2..93fc2db63bc4bccc3ae67a12db9c93aa26ae8a02 100644
--- a/ui/gfx/color_analysis_unittest.cc
+++ b/ui/gfx/color_analysis_unittest.cc
@@ -99,7 +99,6 @@ scoped_refptr<base::RefCountedMemory> CreateTestPNG(
   SkBitmap bitmap;
   bitmap.allocN32Pixels(colors.size(), 1);
 
-  SkAutoLockPixels lock(bitmap);
   for (size_t i = 0; i < colors.size(); ++i) {
     bitmap.eraseArea(SkIRect::MakeXYWH(i, 0, 1, 1), colors[i]);
   }
@@ -149,7 +148,6 @@ bool ChannelApproximatelyEqual(int expected, uint8_t channel) {
 void Calculate8bitBitmapMinMax(const SkBitmap& bitmap,
                                uint8_t* min_gl,
                                uint8_t* max_gl) {
-  SkAutoLockPixels bitmap_lock(bitmap);
   DCHECK(bitmap.getPixels());
   DCHECK_EQ(bitmap.colorType(), kAlpha_8_SkColorType);
   DCHECK(min_gl);