Remove obsolete plugin state handling code.

chrome/browser/ui/pdf/pdf_unsupported_feature.h

Index: chrome/browser/ui/pdf/pdf_unsupported_feature.h
diff --git a/chrome/browser/ui/pdf/pdf_unsupported_feature.h b/chrome/browser/ui/pdf/pdf_unsupported_feature.h
deleted file mode 100644
index 399387fc453c075e92ff3ee26c591985d7f0a386..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/pdf/pdf_unsupported_feature.h
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright (c) 2012 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_UI_PDF_PDF_UNSUPPORTED_FEATURE_H_
-#define CHROME_BROWSER_UI_PDF_PDF_UNSUPPORTED_FEATURE_H_
-
-
-namespace content {
-class WebContents;
-}
-
-// 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  If Reader is out of date, it will put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(content::WebContents* web_contents);
-
-#endif  // CHROME_BROWSER_UI_PDF_PDF_UNSUPPORTED_FEATURE_H_