Determine the element location and click synchronously on the renderer.

chrome/browser/automation/automation_tab_helper.h

Index: chrome/browser/automation/automation_tab_helper.h
diff --git a/chrome/browser/automation/automation_tab_helper.h b/chrome/browser/automation/automation_tab_helper.h
index 739d0cc866379b4e9bb7595e1bcc013adcfe1664..04839e86e16f21f7306d93cf0ababfee1dc75860 100644
--- a/chrome/browser/automation/automation_tab_helper.h
+++ b/chrome/browser/automation/automation_tab_helper.h
@@ -14,8 +14,13 @@
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
 
+struct AutomationMouseEvent;
 class AutomationTabHelper;
 
+namespace gfx {
+class Point;
+}
+
 // An observer API implemented by classes which are interested in various
 // tab events from AutomationTabHelper(s).
 class TabEventObserver {
@@ -49,6 +54,14 @@ class TabEventObserver {
       const std::vector<unsigned char>& png_data,
       const std::string& error_msg) { }
 
+  // Called immediately before the tab processes an automation mouse event.
+  virtual void OnWillProcessMouseEventAt(const gfx::Point& point) { }
+
+  // Called after the tab processes an automation mouse event.
+  // If |success| is false, |error_msg| will be set.
+  virtual void OnProcessMouseEventACK(bool success,
+                                      const std::string& error_msg) { }
+
  protected:
   TabEventObserver();
   virtual ~TabEventObserver();
@@ -93,6 +106,8 @@ class AutomationTabHelper
   void HeapProfilerDump(const std::string& reason);
 #endif  // !defined(NO_TCMALLOC) && (defined(OS_LINUX) || defined(OS_CHROMEOS))
 
+  void ProcessMouseEvent(const AutomationMouseEvent& event);
+
   // Returns true if the tab is loading or the tab is scheduled to load
   // immediately. Note that scheduled loads may be canceled.
   bool has_pending_loads() const;
@@ -104,6 +119,9 @@ class AutomationTabHelper
       bool success,
       const std::vector<unsigned char>& png_data,
       const std::string& error_msg);
+  void OnWillProcessMouseEventAt(const gfx::Point& point);
+  void OnProcessMouseEventACK(bool success,
+                              const std::string& error_msg);
 
   // content::WebContentsObserver implementation.
   virtual void DidStartLoading() OVERRIDE;