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

cc/raster/bitmap_tile_task_worker_pool.cc

Index: cc/raster/bitmap_tile_task_worker_pool.cc
diff --git a/cc/raster/bitmap_tile_task_worker_pool.cc b/cc/raster/bitmap_tile_task_worker_pool.cc
index 586b9a96b1248eb2a9f8dadf6599c131ff2976b2..bd6af35215c9dbbf1452d92eba88ba82d2349ee9 100644
--- a/cc/raster/bitmap_tile_task_worker_pool.cc
+++ b/cc/raster/bitmap_tile_task_worker_pool.cc
@@ -12,6 +12,7 @@
 #include "cc/debug/traced_value.h"
 #include "cc/playback/raster_source.h"
 #include "cc/raster/raster_buffer.h"
+#include "cc/resources/platform_color.h"
 #include "cc/resources/resource.h"
 
 namespace cc {
@@ -178,10 +179,14 @@ void BitmapTileTaskWorkerPool::CheckForCompletedTasks() {
   completed_tasks_.clear();
 }
 
-ResourceFormat BitmapTileTaskWorkerPool::GetResourceFormat() {
+ResourceFormat BitmapTileTaskWorkerPool::GetResourceFormat() const {
   return resource_provider_->best_texture_format();
 }
 
+bool BitmapTileTaskWorkerPool::GetResourceRequiresSwizzle() const {
+  return !PlatformColor::SameComponentOrder(GetResourceFormat());
+}
+
 scoped_ptr<RasterBuffer> BitmapTileTaskWorkerPool::AcquireBufferForRaster(
     const Resource* resource,
     uint64_t resource_content_id,