glBindTexImage2DCHROMIUM should retain pixel format.

gpu/command_buffer/service/stream_texture_manager_in_process_android.cc

Index: gpu/command_buffer/service/stream_texture_manager_in_process_android.cc
diff --git a/gpu/command_buffer/service/stream_texture_manager_in_process_android.cc b/gpu/command_buffer/service/stream_texture_manager_in_process_android.cc
index 174edaa6ee9915391fe87dd12bc64a8b69fcdf65..8fc5de242398f5831b97e3ce0d7f4fb6ba995dc1 100644
--- a/gpu/command_buffer/service/stream_texture_manager_in_process_android.cc
+++ b/gpu/command_buffer/service/stream_texture_manager_in_process_android.cc
@@ -25,6 +25,7 @@ class GLImageImpl : public gfx::GLImage {
   // implement gfx::GLImage
   void Destroy(bool have_context) override;
   gfx::Size GetSize() override;
+  unsigned GetFormat() override;
   bool BindTexImage(unsigned target) override;
   void ReleaseTexImage(unsigned target) override;
   bool CopyTexImage(unsigned target) override;
@@ -64,6 +65,10 @@ gfx::Size GLImageImpl::GetSize() {
   return gfx::Size();
 }
 
+unsigned GLImageImpl::GetFormat() {
+  return GL_RGBA;
+}
+
 bool GLImageImpl::BindTexImage(unsigned target) {
   NOTREACHED();
   return false;