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

public/web/WebViewClient.h

Index: public/web/WebViewClient.h
diff --git a/public/web/WebViewClient.h b/public/web/WebViewClient.h
index 172919c8e0f044375d0bb9f6fbff8fcf409926e4..5fae7b47d6cde9b11660b10373ecc978ac5a3aa1 100644
--- a/public/web/WebViewClient.h
+++ b/public/web/WebViewClient.h
@@ -121,6 +121,10 @@ public:
     // will never be called.
     virtual bool enumerateChosenDirectory(const WebString& path, WebFileChooserCompletion*) { return false; }
 
+    // This method is called in response to WebView's saveImageAt(x, y).
+    // A data url from <canvas> or <img> is passed to the method's argument.
+    virtual void saveImageFromDataURL(const WebString&) { }

[jochen (gone - plz use gerrit), 2014/09/16 15:53:32]

why not pass a WebURL ?

+
 
     // Editing -------------------------------------------------------------