Create CoreTabHelper, move remaining core TCW functionality into it.

chrome/browser/pdf_unsupported_feature.h

Index: chrome/browser/pdf_unsupported_feature.h
diff --git a/chrome/browser/pdf_unsupported_feature.h b/chrome/browser/pdf_unsupported_feature.h
deleted file mode 100644
index f3ab921d20a93ea54f831bbe96088d540777b0b5..0000000000000000000000000000000000000000
--- a/chrome/browser/pdf_unsupported_feature.h
+++ /dev/null
@@ -1,19 +0,0 @@
-// 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.
-
-#ifndef CHROME_BROWSER_PDF_UNSUPPORTED_FEATURE_H_
-#define CHROME_BROWSER_PDF_UNSUPPORTED_FEATURE_H_
-#pragma once
-
-#include "base/basictypes.h"
-
-class TabContentsWrapper;
-
-// Call this when a tab encounters a PDF that has features which our internal
-// viewer doesn't support.  Will take care of puting up an infobar to inform the
-// user and launch Reader if they choose.  If Reader is out of date, it will put
-// up an interstitial.
-void PDFHasUnsupportedFeature(TabContentsWrapper* tab);
-
-#endif  // CHROME_BROWSER_PDF_UNSUPPORTED_FEATURE_H_