[WIP][DO NOT LAND] Componentize spellcheck

chrome/browser/spellchecker/spellchecker_session_bridge_android.h

-// 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_BROWSER_SPELLCHECKER_SPELLCHECKER_SESSION_BRIDGE_ANDROID_H_
-#define CHROME_BROWSER_SPELLCHECKER_SPELLCHECKER_SESSION_BRIDGE_ANDROID_H_
-
-#include <jni.h>
-
-#include <memory>
-
-#include "base/android/scoped_java_ref.h"
-#include "base/macros.h"
-#include "base/strings/string16.h"
-
-// A class used to interface between the Java class of the same name and the
-// android message filter.  This class receives text to be spellchecked
-// from the message filter, sends that text to the Java side via JNI to be
-// spellchecked, and then sends those results to the renderer.
-class SpellCheckerSessionBridge {
- public:
-  explicit SpellCheckerSessionBridge(int render_process_id);
-  ~SpellCheckerSessionBridge();
-  static bool RegisterJNI(JNIEnv* env);
-
-  // Receives text to be checked from the message filter and sends it to Java
-  // to be spellchecked.
-  void RequestTextCheck(int route_id,
-                        int identifier,
-                        const base::string16& text);
-
-  // Receives information from Java side about the typos in a given string
-  // of text, processes these and sends them to the renderer.
-  void ProcessSpellCheckResults(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& jobj,
-      const base::android::JavaParamRef<jintArray>& offset_array,
-      const base::android::JavaParamRef<jintArray>& length_array);
-
-  // Sets the handle to the Java SpellCheckerSessionBridge object to null,
-  // marking the Java object for garbage collection.
-  void DisconnectSession();
-
- private:
-  struct SpellingRequest {
-    SpellingRequest(int route_id, int identifier, const base::string16& text);
-    ~SpellingRequest();
-
-    int route_id;
-    int identifier;
-    base::string16 text;
-  };
-
-  int render_process_id_;
-
-  std::unique_ptr<SpellingRequest> active_request_;
-  std::unique_ptr<SpellingRequest> pending_request_;
-
-  base::android::ScopedJavaGlobalRef<jobject> java_object_;
-  bool java_object_initialization_failed_;
-
-  DISALLOW_COPY_AND_ASSIGN(SpellCheckerSessionBridge);
-};
-
-#endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECKER_SESSION_BRIDGE_ANDROID_H_