Add saveImageFromDataURL() and use it in saveImageAt().

Source/web/tests/WebViewTest.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 112 matching lines @@
     // WebViewClient methods
     virtual void didAutoResize(const WebSize& newSize) { m_testData.setSize(newSize); }
 
     // Local methods
     TestData& testData() { return m_testData; }
 
 private:
     TestData m_testData;
 };
 
+class SaveImageFromDataURLWebViewClient : public FrameTestHelpers::TestWebViewClient {
+public:
+    // WebViewClient methods
+    virtual void saveImageFromDataURL(const WebString& dataURL) { m_dataURL = dataURL; }
+
+    // Local methods
+    const WebString& result() const { return m_dataURL; }
+    void reset() { m_dataURL = WebString(); }
+
+private:
+    WebString m_dataURL;
+};
+
 class TapHandlingWebViewClient : public FrameTestHelpers::TestWebViewClient {
 public:
     // WebViewClient methods
     virtual void didHandleGestureEvent(const WebGestureEvent& event, bool eventCancelled)
     {
         if (event.type == WebInputEvent::GestureTap) {
             m_tapX = event.x;
             m_tapY = event.y;
         } else if (event.type == WebInputEvent::GestureLongPress) {
             m_longpressX = event.x;
@@ skipping 69 matching lines @@
                         HorizontalScrollbarState expectedHorizontalState, VerticalScrollbarState expectedVerticalState);
 
     void testTextInputType(WebTextInputType expectedType, const std::string& htmlFile);
     void testInputMode(const WebString& expectedInputMode, const std::string& htmlFile);
     void testSelectionRootBounds(const char* htmlFile, float pageScaleFactor);
 
     std::string m_baseURL;
     FrameTestHelpers::WebViewHelper m_webViewHelper;
 };
 
+TEST_F(WebViewTest, SaveImageAt)
+{
+    SaveImageFromDataURLWebViewClient client;
+
+    std::string url = m_baseURL + "image-with-data-url.html";
+    URLTestHelpers::registerMockedURLLoad(toKURL(url), "image-with-data-url.html");
+    WebView* webView = m_webViewHelper.initializeAndLoad(url, true, 0, &client);
+    webView->resize(WebSize(400, 400));
+
+    client.reset();
+    webView->saveImageAt(WebPoint(1, 1));
+    EXPECT_EQ(WebString::fromUTF8("data:image/gif;base64"
+        ",R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs="), client.result());
+
+    client.reset();
+    webView->saveImageAt(WebPoint(1, 2));
+    EXPECT_EQ(WebString(), client.result());
+
+    m_webViewHelper.reset(); // Explicitly reset to break dependency on locally scoped client.
+};
+
 TEST_F(WebViewTest, CopyImageAt)
 {
     std::string url = m_baseURL + "canvas-copy-image.html";
     URLTestHelpers::registerMockedURLLoad(toKURL(url), "canvas-copy-image.html");
     WebView* webView = m_webViewHelper.initializeAndLoad(url, true, 0);
     webView->resize(WebSize(400, 400));
     webView->copyImageAt(WebPoint(50, 50));
 
     blink::WebData data = blink::Platform::current()->clipboard()->readImage(blink::WebClipboard::Buffer());
     blink::WebImage image = blink::WebImage::fromData(data, WebSize());
@@ skipping 1947 matching lines @@
     loadFrame(webView->mainFrame(), url);
 
     blink::FrameView* frameView = m_webViewHelper.webViewImpl()->mainFrameImpl()->frameView();
 
     // Auto-resizing used to ASSERT(needsLayout()) in RenderBlockFlow::layout. This EXPECT is
     // merely a dummy. The real test is that we don't trigger asserts in debug builds.
     EXPECT_FALSE(frameView->needsLayout());
 };
 
 } // namespace