Add option --dump-render-tree to content_shell to dump the render tree as text.

content/browser/tab_contents/tab_contents.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/browser/tab_contents/tab_contents.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 1344 matching lines @@
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DocumentLoadedInFrame(frame_id));
 }
 
 void TabContents::OnDidFinishLoad(
     int64 frame_id,
     const GURL& validated_url,
     bool is_main_frame) {
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DidFinishLoad(frame_id, validated_url, is_main_frame));
+  if (is_main_frame)
+    delegate_->DidFinishLoad(this);
 }
 
 void TabContents::OnDidFailLoadWithError(int64 frame_id,
                                          const GURL& validated_url,
                                          bool is_main_frame,
                                          int error_code,
                                          const string16& error_description) {
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DidFailLoad(frame_id, validated_url, is_main_frame,
                                 error_code, error_description));
@@ skipping 903 matching lines @@
   encoding_ = content::GetContentClient()->browser()->
       GetCanonicalEncodingNameByAliasName(encoding);
 }
 
 void TabContents::CreateViewAndSetSizeForRVH(RenderViewHost* rvh) {
   RenderWidgetHostView* rwh_view = GetView()->CreateViewForWidget(rvh);
   // Can be NULL during tests.
   if (rwh_view)
     rwh_view->SetSize(GetView()->GetContainerSize());
 }