Make content text retrieval in ChromeRenderViewObserver never force layout.

chrome/renderer/chrome_render_view_observer.h

 // 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.
 
 #ifndef CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_
 #define CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 38 matching lines @@
           web_cache_render_process_observer);
   ~ChromeRenderViewObserver() override;
 
  private:
   // RenderViewObserver implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
   void DidStartLoading() override;
   void DidStopLoading() override;
   void DidCommitProvisionalLoad(blink::WebLocalFrame* frame,
                                 bool is_new_navigation) override;
+  void DidFirstLayoutAfterFinishedParsing() override;
   void Navigate(const GURL& url) override;
 
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
   void OnWebUIJavaScript(const base::string16& javascript);
 #endif
 #if defined(ENABLE_EXTENSIONS)
   void OnSetVisuallyDeemphasized(bool deemphasized);
 #endif
 #if defined(OS_ANDROID)
   void OnUpdateTopControlsState(content::TopControlsState constraints,
@@ skipping 11 matching lines @@
   // ID.  Kicks off analysis of the captured text.
   void CapturePageInfo(bool preliminary_capture);
 
   // Retrieves the text from the given frame contents, the page text up to the
   // maximum amount kMaxIndexChars will be placed into the given buffer.
   void CaptureText(blink::WebFrame* frame, base::string16* contents);
 
   // Determines if a host is in the strict security host set.
   bool IsStrictSecurityHost(const std::string& host);
 
-  // Checks if a page contains <meta http-equiv="refresh" ...> tag.
-  bool HasRefreshMetaTag(blink::WebFrame* frame);
-
   // Save the JavaScript to preload if a ViewMsg_WebUIJavaScript is received.
   std::vector<base::string16> webui_javascript_;
 
   // Owned by ChromeContentRendererClient and outlive us.
   web_cache::WebCacheRenderProcessObserver* web_cache_render_process_observer_;
 
   // Have the same lifetime as us.
   translate::TranslateHelper* translate_helper_;
   safe_browsing::PhishingClassifierDelegate* phishing_classifier_;
 
   // true if webview is overlayed with grey color.
   bool webview_visually_deemphasized_;
 
   // Used to delay calling CapturePageInfo.
   base::Timer capture_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderViewObserver);
 };
 
 #endif  // CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_