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

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index c6c8d668bad1c26c4c653dd34afb777608be4a18..fd6c7991bde01afe87fb3ade0da564dc89229a1a 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -294,12 +294,16 @@ void PictureLayerImpl::AppendQuads(RenderPass* render_pass,
             append_quads_data->num_incomplete_tiles++;
           }
 
+          // Only swizzle contents for software rasterization, where texture
+          // uploads require it.
+          bool swizzle_contents = !layer_tree_impl()->use_gpu_rasterization() &&
+                                  draw_info.contents_swizzled();

[vmiura, 2015/06/10 01:48:25]

nit: It would be nice if draw_info.contents_swizzled() == false for GPU raster,
rather than draw_info.contents_swizzled() == LIES for GPU raster :).

           TileDrawQuad* quad =
               render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
           quad->SetNew(shared_quad_state, geometry_rect, opaque_rect,
                        visible_geometry_rect, draw_info.resource_id(),
                        texture_rect, draw_info.resource_size(),
-                       draw_info.contents_swizzled(), nearest_neighbor_);
+                       swizzle_contents, nearest_neighbor_);
           ValidateQuadResources(quad);
           has_draw_quad = true;
           break;