[chromedriver] Support clicking an element in sub frames.

chrome/test/chromedriver/web_view.h

Index: chrome/test/chromedriver/web_view.h
diff --git a/chrome/test/chromedriver/web_view.h b/chrome/test/chromedriver/web_view.h
index dcf5194f3b36796120736bb53498b5db3113f08d..55a7122f4ce647141907d5be0c11397998d64b3c 100644
--- a/chrome/test/chromedriver/web_view.h
+++ b/chrome/test/chromedriver/web_view.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
+#include "chrome/test/chromedriver/basic_types.h"
 
 namespace base {
 class ListValue;
@@ -90,6 +91,10 @@ class WebView {
 
   // Captures the visible portions of the web view as a base64-encoded PNG.
   virtual Status CaptureScreenshot(std::string* screenshot) = 0;
+
+  // Return a list of Frame, from the given frame to the main frame.
+  virtual Status GetFramePath(const std::string& frame_id,
+                              std::list<Frame>* frames) = 0;
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_WEB_VIEW_H_