Patch 3: Added files for platform-based spellcheck.

chrome/renderer/spellchecker/platform_engine.h

Index: chrome/renderer/spellchecker/platform_engine.h
diff --git a/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h b/chrome/renderer/spellchecker/platform_engine.h
similarity index 63%
copy from chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h
copy to chrome/renderer/spellchecker/platform_engine.h
index 5cb09bc71f968ce38abf71cba7fdf86abe78e20c..392270b93da8fd0ab2906bb8c4de0810515d840c 100644
--- a/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h
+++ b/chrome/renderer/spellchecker/platform_engine.h
@@ -1,14 +1,14 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2015 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_SPELLCHECKER_NSSPELLCHECKER_ENGINE_H_
-#define CHROME_RENDERER_SPELLCHECKER_NSSPELLCHECKER_ENGINE_H_
+#ifndef CHROME_RENDERER_SPELLCHECKER_PLATFORM_ENGINE_H_
+#define CHROME_RENDERER_SPELLCHECKER_PLATFORM_ENGINE_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/renderer/spellchecker/spelling_engine.h"
 
-class CocoaSpellingEngine : public SpellingEngine {
+class PlatformSpellingEngine : public SpellingEngine {
  public:
   void Init(base::File bdict_file) override;
   bool InitializeIfNeeded() override;
@@ -19,5 +19,5 @@ class CocoaSpellingEngine : public SpellingEngine {
       std::vector<base::string16>* optional_suggestions) override;
 };
 
-#endif  // CHROME_RENDERER_SPELLCHECKER_NSSPELLCHECKER_ENGINE_H_
+#endif  // CHROME_RENDERER_SPELLCHECKER_PLATFORM_ENGINE_H_