Revert of precache: Move the java files into //components/precache/android

chrome/browser/android/precache/precache_launcher.h

-// Copyright 2014 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_ANDROID_PRECACHE_PRECACHE_LAUNCHER_H_
-#define CHROME_BROWSER_ANDROID_PRECACHE_PRECACHE_LAUNCHER_H_
-
-#include <jni.h>
-
-#include "base/android/jni_android.h"
-#include "base/android/jni_weak_ref.h"
-#include "base/memory/weak_ptr.h"
-
-class PrecacheLauncher {
- public:
-  PrecacheLauncher(JNIEnv* env, jobject obj);
-  void Destroy(JNIEnv* env, jobject obj);
-  void Start(JNIEnv* env, jobject obj);
-  void Cancel(JNIEnv* env, jobject obj);
-
- private:
-  ~PrecacheLauncher();
-  // Called when precaching completes.
-  void OnPrecacheCompleted();
-
-  JavaObjectWeakGlobalRef weak_java_precache_launcher_;
-
-  // This must be the last member field in the class.
-  base::WeakPtrFactory<PrecacheLauncher> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(PrecacheLauncher);
-};
-
-// Registers the native methods to be called from Java.
-bool RegisterPrecacheLauncher(JNIEnv* env);
-
-#endif  // CHROME_BROWSER_ANDROID_PRECACHE_PRECACHE_LAUNCHER_H_