Sanitize SVG animation attributes which could set JavaScript URL values.

Source/core/clipboard/Pasteboard.h

Index: Source/core/clipboard/Pasteboard.h
diff --git a/Source/core/clipboard/Pasteboard.h b/Source/core/clipboard/Pasteboard.h
index d0e8092a6e59ae5502d99f88edf2de995a239195..2cf5987d0aa654e103b72443796520ef201e9d9d 100644
--- a/Source/core/clipboard/Pasteboard.h
+++ b/Source/core/clipboard/Pasteboard.h
@@ -46,6 +46,8 @@ public:
         CannotSmartReplace
     };
 
+    Pasteboard();

[dcheng, 2015/06/10 09:35:28]

Can we just use Pasteboard::generalPasteboard() in the unit test, so we don't
have to make this public?

+
     static Pasteboard* generalPasteboard();
     void writePlainText(const String&, SmartReplaceOption);
     void writeImage(Image*, const KURL&, const String& title);
@@ -69,8 +71,6 @@ public:
     WebClipboard::Buffer buffer() const { return m_buffer; }
 
 private:
-    Pasteboard();
-
     WebClipboard::Buffer m_buffer;
 };