Move Data uri handling into WebCore

Source/Platform/chromium/public/Platform.h

Index: Source/Platform/chromium/public/Platform.h
diff --git a/Source/Platform/chromium/public/Platform.h b/Source/Platform/chromium/public/Platform.h
index 2ca26a3d567270b1d7124c4b48b269a9fcd31827..7d5c2f3275cd9495dbc06a2e18f49d7df2054af7 100644
--- a/Source/Platform/chromium/public/Platform.h
+++ b/Source/Platform/chromium/public/Platform.h
@@ -272,6 +272,8 @@ public:
     // A suggestion to cache this metadata in association with this URL.
     virtual void cacheMetadata(const WebURL&, double responseTime, const char* data, size_t dataSize) { }
 
+    // Returns true if the data url was of a supported mimetype and was parsed successfully.
+    virtual bool parseDataUrl(const WebURL&, WebData& mimetype, WebData& charset, WebVector<char>& data) { return false; }
 
     // Plugins -------------------------------------------------------------