Delay activation/draw on GPU tile work completion

cc/raster/zero_copy_raster_buffer_provider.cc

 // Copyright 2013 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/raster/zero_copy_raster_buffer_provider.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
@@ skipping 107 matching lines @@
 bool ZeroCopyRasterBufferProvider::IsResourceSwizzleRequired(
     bool must_support_alpha) const {
   return ResourceFormatRequiresSwizzle(GetResourceFormat(must_support_alpha));
 }
 
 bool ZeroCopyRasterBufferProvider::CanPartialRasterIntoProvidedResource()
     const {
   return false;
 }
 
+bool ZeroCopyRasterBufferProvider::IsResourceReadyToDraw(
+    ResourceId resource_id) const {
+  // Zero-copy resources are immediately ready to draw.
+  return true;
+}
+
+uint64_t ZeroCopyRasterBufferProvider::SetReadyToDrawCallback(
+    const ResourceProvider::ResourceIdArray& resource_ids,
+    const base::Closure& callback,
+    uint64_t pending_callback_id) const {
+  // Zero-copy resources are immediately ready to draw.
+  return 0;
+}
+
 void ZeroCopyRasterBufferProvider::Shutdown() {}
 
 }  // namespace cc