Made double-tap zoom work in pinch virtual viewport mode (Chromium-side).

cc/test/layer_tree_test.cc

 // Copyright 2011 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/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_registrar.h"
 #include "cc/animation/layer_animation_controller.h"
@@ skipping 264 matching lines @@
   virtual void DidBeginMainFrame() OVERRIDE {
     test_hooks_->DidBeginMainFrame();
   }
 
   virtual void BeginMainFrame(const BeginFrameArgs& args) OVERRIDE {
     test_hooks_->BeginMainFrame(args);
   }
 
   virtual void Layout() OVERRIDE { test_hooks_->Layout(); }
 
+  virtual void ApplyViewportDeltas(const gfx::Vector2d& inner_delta,
+                                   const gfx::Vector2d& outer_delta,
+                                   float page_scale,
+                                   float top_controls_delta) OVERRIDE {
+    test_hooks_->ApplyViewportDeltas(inner_delta,
+                                     outer_delta,
+                                     page_scale,
+                                     top_controls_delta);
+  }
   virtual void ApplyViewportDeltas(const gfx::Vector2d& scroll_delta,
                                    float scale,
                                    float top_controls_delta) OVERRIDE {
     test_hooks_->ApplyViewportDeltas(scroll_delta,
                                      scale,
                                      top_controls_delta);
   }
 
   virtual scoped_ptr<OutputSurface> CreateOutputSurface(bool fallback)
       OVERRIDE {
@@ skipping 406 matching lines @@
   return -1;
 }
 
 void LayerTreeTest::DestroyLayerTreeHost() {
   if (layer_tree_host_ && layer_tree_host_->root_layer())
     layer_tree_host_->root_layer()->SetLayerTreeHost(NULL);
   layer_tree_host_.reset();
 }
 
 }  // namespace cc