Implement WebClipboard::writeDataObject.

webkit/tools/test_shell/mock_webclipboard_impl.cc

Index: webkit/tools/test_shell/mock_webclipboard_impl.cc
diff --git a/webkit/tools/test_shell/mock_webclipboard_impl.cc b/webkit/tools/test_shell/mock_webclipboard_impl.cc
index e1b12536b0ff138d55e1f54a32f500b4461f575d..6ca4feb44fc73a280623bc41f64f231b5e9ed7f9 100644
--- a/webkit/tools/test_shell/mock_webclipboard_impl.cc
+++ b/webkit/tools/test_shell/mock_webclipboard_impl.cc
@@ -9,6 +9,7 @@
 #include "base/string_util.h"
 #include "net/base/escape.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCommon.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragData.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebImage.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebURL.h"
 #include "webkit/glue/webclipboard_impl.h"
@@ -158,3 +159,10 @@ void MockWebClipboardImpl::writeImage(const WebKit::WebImage& image,
     m_writeSmartPaste = false;
   }
 }
+
+void MockWebClipboardImpl::writeDataObject(const WebKit::WebDragData& data) {
+  m_htmlText = data.htmlText();
+  m_plainText = data.plainText();
+  m_image.reset();
+  m_writeSmartPaste = false;
+}