Add testRunner.copyAtAndCapturePixelsAsyncThen() method

content/shell/renderer/test_runner/test_runner.h

Index: content/shell/renderer/test_runner/test_runner.h
diff --git a/content/shell/renderer/test_runner/test_runner.h b/content/shell/renderer/test_runner/test_runner.h
index dfd045ce154789c88e3785ce87bb65636ba30938..a4f430de30eb6a2ca9ed6174c83d0012e184c3ff 100644
--- a/content/shell/renderer/test_runner/test_runner.h
+++ b/content/shell/renderer/test_runner/test_runner.h
@@ -543,6 +543,8 @@ class TestRunner : public WebTestRunner,
   // uint8 RGBA format.
   void CapturePixelsAsyncThen(v8::Handle<v8::Function> callback);
 
+  void CopyAtAndCapturePixelsAsyncThen(int x, int y, const v8::Handle<v8::Function> callback);

[Ken Russell (switch to Gerrit), 2014/07/16 20:40:50]

Please document this. "Similar to CapturePixelsAsyncThen(). Copies to the
clipboard the image located at a particular point in the WebView (if there is
such an image), reads back its pixels, and provides the snapshot to the
callback. If there is no image at that point, calls the callback with (0, 0,
null)."

Also, please rename to CopyImageAtAndCapturePixelsAsyncThen here and throughout.

[hj.r.chung, 2014/07/17 05:33:40]

Done. Thanks for writing the description!

+
   void SetMockPushClientSuccess(const std::string& endpoint,
                                 const std::string& registration_id);
   void SetMockPushClientError(const std::string& message);