cc: Hide Gpu Rasterization details in Resource Provider.

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 79104d7ef309afa931109763680b84d7c015c269..cf79940c44f36c87384c99fc9730c20d19e9411c 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -1229,6 +1229,16 @@ ResourceProvider::ScopedWriteLockSoftware::~ScopedWriteLockSoftware() {
   resource_provider_->UnlockForWrite(resource_id_);
 }
 
+ResourceProvider::ScopedGpuRaster::ScopedGpuRaster(
+    ResourceProvider* resource_provider)
+    : resource_provider_(resource_provider) {
+  resource_provider_->BeginGpuRaster();
+}
+
+ResourceProvider::ScopedGpuRaster::~ScopedGpuRaster() {
+  resource_provider_->EndGpuRaster();
+}
+
 ResourceProvider::ResourceProvider(OutputSurface* output_surface,
                                    SharedBitmapManager* shared_bitmap_manager,
                                    int highp_threshold_min,
@@ -2273,4 +2283,32 @@ class GrContext* ResourceProvider::GrContext() const {
   return context_provider ? context_provider->GrContext() : NULL;
 }
 
+void ResourceProvider::BeginGpuRaster() {
+  GLES2Interface* gl = ContextGL();
+  DCHECK(gl);
+
+  // 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 = GrContext();
+  if (gr_context)
+    gr_context->resetContext();
+}
+
+void ResourceProvider::EndGpuRaster() {
+  GLES2Interface* gl = ContextGL();
+  DCHECK(gl);
+
+  class GrContext* gr_context = 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