SkBitmap and SkPixelRef no longer need lock/unlock

cc/resources/ui_resource_bitmap.h

Index: cc/resources/ui_resource_bitmap.h
diff --git a/cc/resources/ui_resource_bitmap.h b/cc/resources/ui_resource_bitmap.h
index 66a8a38d1cf75c871bc0869c751dc7b05ace60af..4acfd2ce7e4dce695193f1a7ca14a28b9ebdaa72 100644
--- a/cc/resources/ui_resource_bitmap.h
+++ b/cc/resources/ui_resource_bitmap.h
@@ -54,6 +54,10 @@ class CC_EXPORT UIResourceBitmap {
     return pixel_ref_ ? pixel_ref_->rowBytes() * size_.height() : 0;
   }
 
+  const uint8_t* GetPixels() const {
+    return static_cast<const uint8_t*>(pixel_ref_->pixels());
+  }
+
  private:
   friend class AutoLockUIResourceBitmap;
 
@@ -67,16 +71,6 @@ class CC_EXPORT UIResourceBitmap {
   bool opaque_;
 };
 
-class CC_EXPORT AutoLockUIResourceBitmap {
- public:
-  explicit AutoLockUIResourceBitmap(const UIResourceBitmap& bitmap);
-  ~AutoLockUIResourceBitmap();
-  const uint8_t* GetPixels() const;
-
- private:
-  const UIResourceBitmap& bitmap_;
-};
-
 }  // namespace cc
 
 #endif  // CC_RESOURCES_UI_RESOURCE_BITMAP_H_