Patch 3: Added files for platform-based spellcheck.

chrome/renderer/spellchecker/platform_engine.cc

-// 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.
 
-#include "chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h"
+#include "chrome/renderer/spellchecker/platform_engine.h"
 
 #include "chrome/common/spellcheck_messages.h"
 #include "content/public/renderer/render_thread.h"
 
 using content::RenderThread;
 
 SpellingEngine* CreateNativeSpellingEngine() {
-  return new CocoaSpellingEngine();
+  return new PlatformSpellingEngine();
 }
 
-void CocoaSpellingEngine::Init(base::File bdict_file) {
+void PlatformSpellingEngine::Init(base::File bdict_file) {
   DCHECK(!bdict_file.IsValid());
 }
 
-bool CocoaSpellingEngine::InitializeIfNeeded() {
-  return false;  // We never need to initialize.
+bool PlatformSpellingEngine::InitializeIfNeeded() {
+  return false;
 }
 
-bool CocoaSpellingEngine::IsEnabled() {
-  return true;  // OSX is always enabled.
+bool PlatformSpellingEngine::IsEnabled() {
+  return true;
 }
 
-// Synchronously query against NSSpellCheck.
+// Synchronously query against the platform's spellchecker.
 // TODO(groby): We might want async support here, too. Ideally,
 // all engines share a similar path for async requests.
-bool CocoaSpellingEngine::CheckSpelling(const base::string16& word_to_check,
+bool PlatformSpellingEngine::CheckSpelling(const base::string16& word_to_check,
                                         int tag) {
   bool word_correct = false;
   RenderThread::Get()->Send(new SpellCheckHostMsg_CheckSpelling(
       word_to_check, tag, &word_correct));
   return word_correct;
 }
 
-// Synchronously query against NSSpellCheck.
+// Synchronously query against platform's spellchecker.
 // TODO(groby): We might want async support here, too. Ideally,
 // all engines share a similar path for async requests.
-void CocoaSpellingEngine::FillSuggestionList(
+void PlatformSpellingEngine::FillSuggestionList(
     const base::string16& wrong_word,
     std::vector<base::string16>* optional_suggestions) {
     RenderThread::Get()->Send(new SpellCheckHostMsg_FillSuggestionList(
         wrong_word, optional_suggestions));
 }