Remove Instant v1 API.

chrome/renderer/search_extension.h

Index: chrome/renderer/search_extension.h
diff --git a/chrome/renderer/search_extension.h b/chrome/renderer/search_extension.h
deleted file mode 100644
index 99c6f1f0e1d22d79aa56b5bd10bad99c22c5f63c..0000000000000000000000000000000000000000
--- a/chrome/renderer/search_extension.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright (c) 2010 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_RENDERER_SEARCH_EXTENSION_H_
-#define CHROME_RENDERER_SEARCH_EXTENSION_H_
-
-namespace v8 {
-class Extension;
-}
-
-namespace extensions_v8 {
-
-class SearchExtension {
- public:
-  // Returns the v8::Extension object handling search bindings. Returns null if
-  // match-preview is not enabled. Caller takes ownership of returned object.
-  static v8::Extension* Get();
-};
-
-}  // namespace extensions_v8
-
-#endif  // CHROME_RENDERER_SEARCH_EXTENSION_H_