Revert "Currently, base/timer.cc calls PostTask with FROM_HERE as the Location,

chrome/browser/instant/instant_loader.cc

 // Copyright (c) 2011 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/instant/instant_loader.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 666 matching lines @@
   if (preview_contents_.get() && is_showing_instant() &&
       !is_waiting_for_load()) {
     // Updating the bounds is rather expensive, and because of the async nature
     // of the omnibox the bounds can dance around a bit. Delay the update in
     // hopes of things settling down. To avoid hiding results we grow
     // immediately, but delay shrinking.
     update_bounds_timer_.Stop();
     if (omnibox_bounds_.height() > last_omnibox_bounds_.height()) {
       SendBoundsToPage(false);
     } else {
-      update_bounds_timer_.Start(FROM_HERE,
+      update_bounds_timer_.Start(
           base::TimeDelta::FromMilliseconds(kUpdateBoundsDelayMS),
           this, &InstantLoader::ProcessBoundsChange);
     }
   }
 }
 
 bool InstantLoader::IsMouseDownFromActivate() {
   return preview_tab_contents_delegate_.get() &&
       preview_tab_contents_delegate_->is_mouse_down_from_activate();
 }
@@ skipping 335 matching lines @@
   CommandLine* cl = CommandLine::ForCurrentProcess();
   if (cl->HasSwitch(switches::kInstantURL))
     instant_url = GURL(cl->GetSwitchValueASCII(switches::kInstantURL));
   preview_contents_->controller().LoadURL(instant_url, GURL(), transition_type);
   RenderViewHost* host = preview_contents_->render_view_host();
   host->Send(new ChromeViewMsg_SearchBoxChange(
       host->routing_id(), user_text, verbatim, 0, 0));
   frame_load_observer_.reset(new FrameLoadObserver(
       this, preview_contents()->tab_contents(), user_text, verbatim));
 }