Remove NaCl.Startups histogram, this data is tracked in the NaCl plugin now

chrome/browser/tabs/default_tab_handler.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 "base/metrics/nacl_histogram.h"
 #include "chrome/browser/tabs/default_tab_handler.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser.h"
 
 ////////////////////////////////////////////////////////////////////////////////
 // DefaultTabHandler, public:
 
 DefaultTabHandler::DefaultTabHandler(TabHandlerDelegate* delegate)
     : delegate_(delegate),
       ALLOW_THIS_IN_INITIALIZER_LIST(
           model_(new TabStripModel(this, delegate->GetProfile()))) {
-  UmaNaclHistogramEnumeration(FIRST_TAB_NACL_BASELINE);
   model_->AddObserver(this);
 }
 
 DefaultTabHandler::~DefaultTabHandler() {
   // The tab strip should not have any tabs at this point.
   DCHECK(model_->empty());
   model_->RemoveObserver(this);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DefaultTabHandler, TabHandler implementation:
 
 TabStripModel* DefaultTabHandler::GetTabStripModel() const {
   return model_.get();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DefaultTabHandler, TabStripModelDelegate implementation:
 
 TabContentsWrapper* DefaultTabHandler::AddBlankTab(bool foreground) {
-  UmaNaclHistogramEnumeration(NEW_TAB_NACL_BASELINE);
   return delegate_->AsBrowser()->AddBlankTab(foreground);
 }
 
 TabContentsWrapper* DefaultTabHandler::AddBlankTabAt(int index,
                                                      bool foreground) {
   return delegate_->AsBrowser()->AddBlankTabAt(index, foreground);
 }
 
 Browser* DefaultTabHandler::CreateNewStripWithContents(
     TabContentsWrapper* detached_contents,
@@ skipping 146 matching lines @@
   delegate_->AsBrowser()->TabStripEmpty();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // TabHandler, public:
 
 // static
 TabHandler* TabHandler::CreateTabHandler(TabHandlerDelegate* delegate) {
   return new DefaultTabHandler(delegate);
 }