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

cc/trees/layer_tree_host_unittest_no_message_loop.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 "base/message_loop/message_loop_proxy.h"
 #include "base/threading/simple_thread.h"
 #include "cc/layers/delegated_frame_provider.h"
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/layers/delegated_renderer_layer.h"
 #include "cc/layers/layer.h"
@@ skipping 39 matching lines @@
         did_commit_and_draw_frame_(false),
         size_(100, 100),
         no_loop_thread_(this, "LayerTreeHostNoMessageLoopTest") {}
   virtual ~LayerTreeHostNoMessageLoopTest() {}
 
   // LayerTreeHostClient overrides.
   virtual void WillBeginMainFrame(int frame_id) OVERRIDE {}
   virtual void BeginMainFrame(const BeginFrameArgs& args) OVERRIDE {}
   virtual void DidBeginMainFrame() OVERRIDE {}
   virtual void Layout() OVERRIDE {}
+  virtual void ApplyViewportDeltas(const gfx::Vector2d& inner_delta,
+                                   const gfx::Vector2d& outer_delta,
+                                   float page_scale,
+                                   float top_controls_delta) OVERRIDE {}
   virtual void ApplyViewportDeltas(const gfx::Vector2d& scroll_delta,
                                    float page_scale,
                                    float top_controls_delta) OVERRIDE {}
   virtual scoped_ptr<OutputSurface> CreateOutputSurface(
       bool fallback) OVERRIDE {
     return make_scoped_ptr<OutputSurface>(new NoMessageLoopOutputSurface);
   }
   virtual void DidInitializeOutputSurface() OVERRIDE {
     did_initialize_output_surface_ = true;
   }
@@ skipping 157 matching lines @@
   scoped_refptr<DelegatedFrameProvider> frame_provider_;
   scoped_refptr<DelegatedRendererLayer> delegated_layer_;
 };
 
 TEST_F(LayerTreeHostNoMessageLoopDelegatedLayer, SingleDelegatedLayer) {
   RunTest();
 }
 
 }  // namespace
 }  // namespace cc