(NOT FOR COMMIT) Testing layer invalidation speedups.

cc/blink/web_layer_impl.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/blink/web_layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 40 matching lines @@
 }
 
 int WebLayerImpl::id() const {
   return layer_->id();
 }
 
 void WebLayerImpl::invalidateRect(const blink::WebRect& rect) {
   layer_->SetNeedsDisplayRect(rect);
 }
 
+void WebLayerImpl::invalidateRects(const std::vector<blink::WebRect>& rects) {
+  for (size_t i = 0; i < rects.size(); ++i) {
+    layer_->SetNeedsDisplayRect(rects[i]);
+  }
+}
+
 void WebLayerImpl::invalidate() {
   layer_->SetNeedsDisplay();
 }
 
 void WebLayerImpl::addChild(WebLayer* child) {
   layer_->AddChild(static_cast<WebLayerImpl*>(child)->layer());
 }
 
 void WebLayerImpl::insertChild(WebLayer* child, size_t index) {
   layer_->InsertChild(static_cast<WebLayerImpl*>(child)->layer(), index);
@@ skipping 344 matching lines @@
 
 void WebLayerImpl::SetContentsOpaqueIsFixed(bool fixed) {
   contents_opaque_is_fixed_ = fixed;
 }
 
 void WebLayerImpl::setHasWillChangeTransformHint(bool has_will_change) {
   layer_->SetHasWillChangeTransformHint(has_will_change);
 }
 
 }  // namespace cc_blink