Revert of Remove about:srcdoc url conversion.

content/browser/android/web_contents_observer_proxy.cc

Index: content/browser/android/web_contents_observer_proxy.cc
diff --git a/content/browser/android/web_contents_observer_proxy.cc b/content/browser/android/web_contents_observer_proxy.cc
index e6a4c9dd69fe76a10ee805294bb50b2b84846257..0efc07cdf50bbbed365c59c140551ed5dbe4e8a7 100644
--- a/content/browser/android/web_contents_observer_proxy.cc
+++ b/content/browser/android/web_contents_observer_proxy.cc
@@ -191,7 +191,8 @@
 void WebContentsObserverProxy::DidStartProvisionalLoadForFrame(
     RenderFrameHost* render_frame_host,
     const GURL& validated_url,
-    bool is_error_page) {
+    bool is_error_page,
+    bool is_iframe_srcdoc) {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj(java_observer_);
   ScopedJavaLocalRef<jstring> jstring_url(
@@ -203,7 +204,8 @@
       render_frame_host->GetParent()
           ? render_frame_host->GetParent()->GetRoutingID()
           : -1,
-      !render_frame_host->GetParent(), jstring_url, is_error_page);
+      !render_frame_host->GetParent(), jstring_url, is_error_page,
+      is_iframe_srcdoc);
 }
 
 void WebContentsObserverProxy::DidCommitProvisionalLoadForFrame(