Add API for hit testing layer_impl touchEventHandlerRegions from the host

webkit/compositor_bindings/web_to_ccinput_handler_adapter.cc

 // Copyright 2012 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 "web_to_ccinput_handler_adapter.h"
 
 #include "third_party/WebKit/Source/Platform/chromium/public/WebInputHandlerClient.h"
 
 #define COMPILE_ASSERT_MATCHING_ENUM(webkit_name, cc_name) \
     COMPILE_ASSERT(int(WebKit::webkit_name) == int(cc::cc_name), mismatching_enums)
@@ skipping 70 matching lines @@
         base::TimeTicks startTime = base::TimeTicks::FromInternalValue(startTimeSec * base::Time::kMicrosecondsPerSecond);
         base::TimeDelta duration = base::TimeDelta::FromMicroseconds(durationSec * base::Time::kMicrosecondsPerSecond);
         m_client->startPageScaleAnimation(targetPosition, anchorPoint, pageScale, startTime, duration);
     }
 
     virtual void scheduleAnimation() OVERRIDE
     {
         m_client->scheduleAnimation();
     }
 
+    virtual bool haveTouchEventHandlersAt(WebPoint point)
+    {
+        return m_client->haveTouchEventHandlersAt(point);
+    }
+
 private:
     cc::InputHandlerClient* m_client;
 };
 
 
 void WebToCCInputHandlerAdapter::bindToClient(cc::InputHandlerClient* client)
 {
     m_clientAdapter.reset(new ClientAdapter(client));
     m_handler->bindToClient(m_clientAdapter.get());
 }
 
 void WebToCCInputHandlerAdapter::animate(base::TimeTicks time)
 {
     double monotonicTimeSeconds = (time - base::TimeTicks()).InSecondsF();
     m_handler->animate(monotonicTimeSeconds);
 }
 
 }  // namespace WebKit