Revert of Remove about:srcdoc url conversion.

content/browser/android/web_contents_observer_proxy.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_BROWSER_ANDROID_WEB_CONTENTS_OBSERVER_PROXY_H_
 #define CONTENT_BROWSER_ANDROID_WEB_CONTENTS_OBSERVER_PROXY_H_
 
 #include <jni.h>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 39 matching lines @@
   void DidNavigateAnyFrame(RenderFrameHost* render_frame_host,
                            const LoadCommittedDetails& details,
                            const FrameNavigateParams& params) override;
   void DocumentAvailableInMainFrame() override;
   void DidFirstVisuallyNonEmptyPaint() override;
   void WasShown() override;
   void WasHidden() override;
   void TitleWasSet(NavigationEntry* entry, bool explicit_set) override;
   void DidStartProvisionalLoadForFrame(RenderFrameHost* render_frame_host,
                                        const GURL& validated_url,
-                                       bool is_error_page) override;
+                                       bool is_error_page,
+                                       bool is_iframe_srcdoc) override;
   void DidCommitProvisionalLoadForFrame(
       RenderFrameHost* render_frame_host,
       const GURL& url,
       ui::PageTransition transition_type) override;
   void DidFinishLoad(RenderFrameHost* render_frame_host,
                      const GURL& validated_url) override;
   void DocumentLoadedInFrame(RenderFrameHost* render_frame_host) override;
   void NavigationEntryCommitted(
       const LoadCommittedDetails& load_details) override;
   void WebContentsDestroyed() override;
@@ skipping 15 matching lines @@
   base::android::ScopedJavaGlobalRef<jobject> java_observer_;
   GURL base_url_of_last_started_data_url_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserverProxy);
 };
 
 bool RegisterWebContentsObserverProxy(JNIEnv* env);
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_WEB_CONTENTS_OBSERVER_PROXY_H_