cc: Add TODO's in ScopedGpuRaster.

cc/resources/scoped_gpu_raster.cc

Index: cc/resources/scoped_gpu_raster.cc
diff --git a/cc/resources/scoped_gpu_raster.cc b/cc/resources/scoped_gpu_raster.cc
index 380063f13ae3137e85056da224a3729f08fd72cf..517c7a7d81465371729cda5f4b2ca99aaa97917e 100644
--- a/cc/resources/scoped_gpu_raster.cc
+++ b/cc/resources/scoped_gpu_raster.cc
@@ -30,6 +30,7 @@ void ScopedGpuRaster::BeginGpuRaster() {
   gl->PushGroupMarkerEXT(0, "GpuRasterization");
 
   class GrContext* gr_context = context_provider_->GrContext();
+  // TODO(sohanjg): Remove when TestContextProvider gives a GrContext.
   if (gr_context)
     gr_context->resetContext();
 }
@@ -38,6 +39,7 @@ void ScopedGpuRaster::EndGpuRaster() {
   GLES2Interface* gl = context_provider_->ContextGL();
 
   class GrContext* gr_context = context_provider_->GrContext();
+  // TODO(sohanjg): Remove when TestContextProvider gives a GrContext.
   if (gr_context)
     gr_context->flush();