Add testRunner.copyAtAndCapturePixelsAsyncThen() method

content/shell/renderer/test_runner/web_test_proxy.cc

Index: content/shell/renderer/test_runner/web_test_proxy.cc
diff --git a/content/shell/renderer/test_runner/web_test_proxy.cc b/content/shell/renderer/test_runner/web_test_proxy.cc
index e3838f6481af96bc6dddcad9c6b5b929aafc52a9..6ae6f98e06cbced83c27c988b37ab84d87ef1b3b 100644
--- a/content/shell/renderer/test_runner/web_test_proxy.cc
+++ b/content/shell/renderer/test_runner/web_test_proxy.cc
@@ -26,7 +26,9 @@
 #include "content/shell/renderer/test_runner/web_test_runner.h"
 // FIXME: Including platform_canvas.h here is a layering violation.
 #include "skia/ext/platform_canvas.h"
+#include "third_party/WebKit/public/platform/Platform.h"
 #include "third_party/WebKit/public/platform/WebCString.h"
+#include "third_party/WebKit/public/platform/WebClipboard.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
@@ -468,6 +470,20 @@ void WebTestProxyBase::SetAcceptLanguages(const std::string& accept_languages) {
     GetWebView()->acceptLanguagesChanged();
 }
 
+void WebTestProxyBase::CopyAtAndCapturePixels(
+    const int x, const int y, const base::Callback<void(const SkBitmap&)>& callback) {
+  DCHECK(web_widget_->isAcceleratedCompositingActive());
+  DCHECK(!callback.is_null());
+
+  GetWebView()->copyImageAt(blink::WebPoint(x, y));
+  blink::WebData data = blink::Platform::current()->clipboard()->readImage(blink::WebClipboard::Buffer());

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

You'll need to handle the case where WebView::copyImageAt doesn't find an image
at the given (x, y) point. Please make sure to add a layout test for this.

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

I added a test in the Blink patch. Thanks!

+  blink::WebImage image = blink::WebImage::fromData(data, blink::WebSize());
+  const SkBitmap& bitmap = image.getSkBitmap();
+  SkAutoLockPixels autoLock(bitmap);
+  callback.Run(bitmap);
+}
+
+
 void WebTestProxyBase::CapturePixelsForPrinting(
     const base::Callback<void(const SkBitmap&)>& callback) {
   web_widget_->layout();