Determine the element location and click synchronously on the renderer.

chrome/browser/automation/mock_tab_event_observer.h

Index: chrome/browser/automation/mock_tab_event_observer.h
diff --git a/chrome/browser/automation/mock_tab_event_observer.h b/chrome/browser/automation/mock_tab_event_observer.h
index 2e6a0a2421b412f4396d208a41910fe251d0053c..3d8a6d06c60b4612ba1368cfd414177c9890f89b 100644
--- a/chrome/browser/automation/mock_tab_event_observer.h
+++ b/chrome/browser/automation/mock_tab_event_observer.h
@@ -6,8 +6,11 @@
 #define CHROME_BROWSER_AUTOMATION_MOCK_TAB_EVENT_OBSERVER_H_
 #pragma once
 
+#include <string>
+
 #include "chrome/browser/automation/automation_tab_helper.h"
 #include "testing/gmock/include/gmock/gmock.h"
+#include "ui/gfx/point.h"
 
 class MockTabEventObserver : public TabEventObserver {
  public:
@@ -22,6 +25,9 @@ class MockTabEventObserver : public TabEventObserver {
 
   MOCK_METHOD1(OnFirstPendingLoad, void(content::WebContents* tab_contents));
   MOCK_METHOD1(OnNoMorePendingLoads, void(content::WebContents* tab_contents));
+  MOCK_METHOD1(OnWillProcessMouseEventAt, void(const gfx::Point& point));
+  MOCK_METHOD2(OnProcessMouseEventACK,
+               void(bool success, const std::string& error_msg));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockTabEventObserver);