Remove sync handling of IsSearchProviderInstalled on the browser UI thread.

chrome/browser/tab_contents/tab_contents.h

 // Copyright (c) 2010 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_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 925 matching lines @@
                                       IPC::Message* reply_msg);
   virtual void ShowModalHTMLDialog(const GURL& url, int width, int height,
                                    const std::string& json_arguments,
                                    IPC::Message* reply_msg);
   virtual void PasswordFormsFound(
       const std::vector<webkit_glue::PasswordForm>& forms);
   virtual void PasswordFormsVisible(
       const std::vector<webkit_glue::PasswordForm>& visible_forms);
   virtual void PageHasOSDD(RenderViewHost* render_view_host,
                            int32 page_id, const GURL& url, bool autodetected);
-  virtual ViewHostMsg_GetSearchProviderInstallState_Params
-      GetSearchProviderInstallState(const GURL& url);
   virtual GURL GetAlternateErrorPageURL() const;
   virtual RendererPreferences GetRendererPrefs(Profile* profile) const;
   virtual WebPreferences GetWebkitPrefs();
   virtual void OnIgnoredUIEvent();
   virtual void OnJSOutOfMemory();
   virtual void OnCrossSiteResponse(int new_render_process_host_id,
                                    int new_request_id);
   virtual gfx::Rect GetRootWindowResizerRect() const;
   virtual void RendererUnresponsive(RenderViewHost* render_view_host,
                                     bool is_during_unload);
@@ skipping 299 matching lines @@
   bool displaying_pdf_content_;
 
   scoped_ptr<MatchPreview> match_preview_;
 
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_