Remove sync handling of IsSearchProviderInstalled on the browser UI thread.

chrome/browser/renderer_host/render_view_host_delegate.h

Index: chrome/browser/renderer_host/render_view_host_delegate.h
diff --git a/chrome/browser/renderer_host/render_view_host_delegate.h b/chrome/browser/renderer_host/render_view_host_delegate.h
index 51e5029a5a1deda56c25de2d8f0d6cf6c8cf6c20..6ec1b8f7d770eb20250a424c4ddeadd60d74f1ea 100644
--- a/chrome/browser/renderer_host/render_view_host_delegate.h
+++ b/chrome/browser/renderer_host/render_view_host_delegate.h
@@ -47,7 +47,6 @@ struct ThumbnailScore;
 struct ViewHostMsg_DidPrintPage_Params;
 struct ViewHostMsg_DomMessage_Params;
 struct ViewHostMsg_FrameNavigate_Params;
-struct ViewHostMsg_GetSearchProviderInstallState_Params;
 struct ViewHostMsg_RunFileChooser_Params;
 struct WebDropData;
 class WebKeyboardEvent;
@@ -759,11 +758,6 @@ class RenderViewHostDelegate {
                            int32 page_id, const GURL& doc_url,
                            bool autodetected) {}
 
-  // Returns the install state of the search provider url (not installed,
-  // installed, default).
-  virtual ViewHostMsg_GetSearchProviderInstallState_Params
-      GetSearchProviderInstallState(const GURL& url);
-
   // |url| is assigned to a server that can provide alternate error pages.  If
   // the returned URL is empty, the default error page built into WebKit will
   // be used.