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

gpu/command_buffer/common/capabilities.cc

Index: gpu/command_buffer/common/capabilities.cc
diff --git a/gpu/command_buffer/common/capabilities.cc b/gpu/command_buffer/common/capabilities.cc
index 8a228713e84662cc02c7f68325e0972fd83f7bf8..2dc383aa2d867ba571e8619fae6d69b3cb381337 100644
--- a/gpu/command_buffer/common/capabilities.cc
+++ b/gpu/command_buffer/common/capabilities.cc
@@ -73,6 +73,7 @@ Capabilities::Capabilities()
       blend_equation_advanced(false),
       blend_equation_advanced_coherent(false),
       texture_rg(false),
+      render_buffer_format_bgra8888(false),
       major_version(2),
       minor_version(0) {
 }