cc: Refactor ResourceProvider.

cc/resources/scoped_gpu_raster.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/resources/scoped_gpu_raster.h"
+#include "gpu/command_buffer/client/gles2_interface.h"
+#include "third_party/khronos/GLES2/gl2.h"
+#include "third_party/khronos/GLES2/gl2ext.h"
+#include "third_party/skia/include/gpu/GrContext.h"
+
+using gpu::gles2::GLES2Interface;
+
+namespace cc {
+
+ScopedGpuRaster::ScopedGpuRaster(ContextProvider* context_provider)
+    : context_provider_(context_provider) {
+  BeginGpuRaster();
+}
+
+ScopedGpuRaster::~ScopedGpuRaster() {
+  EndGpuRaster();
+}
+
+void ScopedGpuRaster::BeginGpuRaster() {
+  GLES2Interface* gl = context_provider_->ContextGL();
+
+  // TODO(alokp): Use a trace macro to push/pop markers.
+  // Using push/pop functions directly incurs cost to evaluate function
+  // arguments even when tracing is disabled.
+  gl->PushGroupMarkerEXT(0, "GpuRasterization");
+
+  class GrContext* gr_context = context_provider_->GrContext();
+  if (gr_context)
+    gr_context->resetContext();
+}
+
+void ScopedGpuRaster::EndGpuRaster() {
+  GLES2Interface* gl = context_provider_->ContextGL();
+
+  class GrContext* gr_context = context_provider_->GrContext();
+  if (gr_context)
+    gr_context->flush();
+
+  // TODO(alokp): Use a trace macro to push/pop markers.
+  // Using push/pop functions directly incurs cost to evaluate function
+  // arguments even when tracing is disabled.
+  gl->PopGroupMarkerEXT();
+}
+
+}  // namespace cc