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

cc/raster/pixel_buffer_tile_task_worker_pool.cc

Index: cc/raster/pixel_buffer_tile_task_worker_pool.cc
diff --git a/cc/raster/pixel_buffer_tile_task_worker_pool.cc b/cc/raster/pixel_buffer_tile_task_worker_pool.cc
index 14b6ee280926c9c3694f0b748aac9bf1ff697303..df79519485d8d3ee1b1301e24b699c235467c81b 100644
--- a/cc/raster/pixel_buffer_tile_task_worker_pool.cc
+++ b/cc/raster/pixel_buffer_tile_task_worker_pool.cc
@@ -12,6 +12,7 @@
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/debug/traced_value.h"
 #include "cc/raster/raster_buffer.h"
+#include "cc/resources/platform_color.h"
 #include "cc/resources/resource.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 
@@ -312,10 +313,14 @@ void PixelBufferTileTaskWorkerPool::CheckForCompletedTasks() {
   completed_raster_tasks_.clear();
 }
 
-ResourceFormat PixelBufferTileTaskWorkerPool::GetResourceFormat() {
+ResourceFormat PixelBufferTileTaskWorkerPool::GetResourceFormat() const {
   return resource_provider_->memory_efficient_texture_format();
 }
 
+bool PixelBufferTileTaskWorkerPool::GetResourceRequiresSwizzle() const {
+  return !PlatformColor::SameComponentOrder(GetResourceFormat());
+}
+
 scoped_ptr<RasterBuffer> PixelBufferTileTaskWorkerPool::AcquireBufferForRaster(
     const Resource* resource,
     uint64_t resource_content_id,