cc: Refactor ResourceProvider.

cc/resources/pixel_buffer_raster_worker_pool.cc

Index: cc/resources/pixel_buffer_raster_worker_pool.cc
diff --git a/cc/resources/pixel_buffer_raster_worker_pool.cc b/cc/resources/pixel_buffer_raster_worker_pool.cc
index 1df2362a5aee337a1e3a5219e32274fc859ef3da..e943e3bc3ab59f7b53fbce0c431b55cdb15dfae4 100644
--- a/cc/resources/pixel_buffer_raster_worker_pool.cc
+++ b/cc/resources/pixel_buffer_raster_worker_pool.cc
@@ -10,6 +10,9 @@
 #include "base/debug/trace_event.h"
 #include "cc/debug/traced_value.h"
 #include "cc/resources/resource.h"
+#include "gpu/command_buffer/client/gles2_interface.h"
+
+using gpu::gles2::GLES2Interface;
 
 namespace cc {
 namespace {
@@ -315,7 +318,9 @@ void PixelBufferRasterWorkerPool::FlushUploads() {
   if (!has_performed_uploads_since_last_flush_)
     return;
 
-  resource_provider_->ShallowFlushIfSupported();
+  GLES2Interface* gl = resource_provider_->ContextGL();
+  if (gl)
+    gl->ShallowFlushCHROMIUM();
   has_performed_uploads_since_last_flush_ = false;
 }