Don't allow sending data URLs to WebUI, unless in a ChromeOS BalloonHost.

content/public/browser/web_contents_delegate.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/public/browser/web_contents_delegate.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 12 matching lines @@
                                                  const OpenURLParams& params) {
   return NULL;
 }
 
 bool WebContentsDelegate::IsPopupOrPanel(const WebContents* source) const {
   return false;
 }
 
 bool WebContentsDelegate::IsApplication() const { return false; }
 
+bool WebContentsDelegate::CanLoadDataURLsInWebUI() const { return false; }
+
 bool WebContentsDelegate::CanReloadContents(WebContents* source) const {
   return true;
 }
 
 gfx::Rect WebContentsDelegate::GetRootWindowResizerRect() const {
   return gfx::Rect();
 }
 
 bool WebContentsDelegate::ShouldSuppressDialogs() {
   return false;
@@ skipping 119 matching lines @@
   DCHECK(attached_contents_.find(web_contents) == attached_contents_.end());
   attached_contents_.insert(web_contents);
 }
 
 void WebContentsDelegate::Detach(WebContents* web_contents) {
   DCHECK(attached_contents_.find(web_contents) != attached_contents_.end());
   attached_contents_.erase(web_contents);
 }
 
 }  // namespace content