cc, gpu: Use RGBA when using msaa on systems that don't support BGRA

cc/raster/tile_task_runner.h

Index: cc/raster/tile_task_runner.h
diff --git a/cc/raster/tile_task_runner.h b/cc/raster/tile_task_runner.h
index a4c7d8899b8328a46acc24ae829caa73bb961891..9dffee48c743ab05e306865736be3303a5bac6d0 100644
--- a/cc/raster/tile_task_runner.h
+++ b/cc/raster/tile_task_runner.h
@@ -163,7 +163,10 @@ class CC_EXPORT TileTaskRunner {
   virtual void CheckForCompletedTasks() = 0;
 
   // Returns the format to use for the tiles.
-  virtual ResourceFormat GetResourceFormat() = 0;
+  virtual ResourceFormat GetResourceFormat() const = 0;
+
+  // Determine if the resource requires swizzling.
+  virtual bool GetResourceRequiresSwizzle() const = 0;
 
  protected:
   virtual ~TileTaskRunner() {}