Remove sync handling of IsSearchProviderInstalled on the browser UI thread.

chrome/browser/renderer_host/render_view_host_delegate.cc

 // 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.
 
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 
 #include "base/singleton.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/renderer_preferences.h"
 #include "gfx/rect.h"
@@ skipping 77 matching lines @@
 }
 
 TabContents* RenderViewHostDelegate::GetAsTabContents() {
   return NULL;
 }
 
 GURL RenderViewHostDelegate::GetAlternateErrorPageURL() const {
   return GURL();
 }
 
-ViewHostMsg_GetSearchProviderInstallState_Params
-RenderViewHostDelegate::GetSearchProviderInstallState(const GURL& url) {
-  return ViewHostMsg_GetSearchProviderInstallState_Params::Denied();
-}
-
 WebPreferences RenderViewHostDelegate::GetWebkitPrefs() {
   return WebPreferences();
 }
 
 gfx::Rect RenderViewHostDelegate::GetRootWindowResizerRect() const {
   return gfx::Rect();
 }
 
 bool RenderViewHostDelegate::IsExternalTabContainer() const {
   return false;
 }