Patch 3: Added files for platform-based spellcheck.

chrome/browser/spellchecker/spellcheck_platform.h

Index: chrome/browser/spellchecker/spellcheck_platform.h
diff --git a/chrome/browser/spellchecker/spellcheck_platform_mac.h b/chrome/browser/spellchecker/spellcheck_platform.h
similarity index 92%
copy from chrome/browser/spellchecker/spellcheck_platform_mac.h
copy to chrome/browser/spellchecker/spellcheck_platform.h
index 1ddc5f6efb6722c5a7d3d0e212ca93108be0c1d1..7300e24ebc06d1d72f5c52b362d6742ca58b9204 100644
--- a/chrome/browser/spellchecker/spellcheck_platform_mac.h
+++ b/chrome/browser/spellchecker/spellcheck_platform.h
@@ -1,12 +1,12 @@
-// Copyright (c) 2011 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.
 
 // This file defines the interface that any platform-specific spellchecker
 // needs to implement in order to be used by the browser.
 
-#ifndef CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_MAC_H_
-#define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_MAC_H_
+#ifndef CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_H_
+#define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_H_
 
 #include <string>
 #include <vector>
@@ -20,7 +20,7 @@ namespace content {
 class BrowserMessageFilter;
 }  // namespace content
 
-namespace spellcheck_mac {
+namespace spellcheck_platform {
 
 typedef base::Callback<void(
         const std::vector<SpellCheckResult>& /* results */)>
@@ -107,6 +107,6 @@ class ScopedEnglishLanguageForTest {
   SpellcheckerStateInternal* state_;
 };
 
-}  // namespace spellcheck_mac
+}  // namespace spellcheck_platform
 
-#endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_MAC_H_
+#endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_H_