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

chrome/browser/android/precache/precache_launcher.cc

-// 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.
-
-#include "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/bind.h"
-#include "base/logging.h"
-#include "base/prefs/pref_service.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/history/top_sites_factory.h"
-#include "chrome/browser/precache/most_visited_urls_provider.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/profiles/profile_manager.h"
-#include "components/data_reduction_proxy/core/common/data_reduction_proxy_pref_names.h"
-#include "components/history/core/browser/top_sites.h"
-#include "components/precache/content/precache_manager.h"
-#include "components/precache/content/precache_manager_factory.h"
-#include "jni/PrecacheLauncher_jni.h"
-
-using base::android::AttachCurrentThread;
-using precache::PrecacheManager;
-
-namespace {
-
-// Get the profile that should be used for precaching.
-Profile* GetProfile() {
-  Profile* profile = g_browser_process->profile_manager()->GetLastUsedProfile()
-      ->GetOriginalProfile();
-  DCHECK(profile);
-  DCHECK(g_browser_process->profile_manager()->IsValidProfile(profile));
-  return profile;
-}
-
-// Get the PrecacheManager for the given |profile|.
-PrecacheManager* GetPrecacheManager(Profile* profile) {
-  PrecacheManager* precache_manager =
-      precache::PrecacheManagerFactory::GetForBrowserContext(profile);
-  DCHECK(precache_manager);
-  return precache_manager;
-}
-
-bool IsDataReductionProxyEnabled(Profile* profile) {
-  // TODO(bengr): Use DataReductionProxySettings instead once it is safe to
-  // instantiate from here.
-  PrefService* prefs = profile->GetPrefs();
-  return prefs && prefs->GetBoolean(
-      data_reduction_proxy::prefs::kDataReductionProxyEnabled);
-}
-
-}  // namespace
-
-PrecacheLauncher::PrecacheLauncher(JNIEnv* env, jobject obj)
-    : weak_java_precache_launcher_(env, obj), weak_factory_(this) {}
-
-PrecacheLauncher::~PrecacheLauncher() {}
-
-void PrecacheLauncher::Destroy(JNIEnv* env, jobject obj) {
-  delete this;
-}
-
-void PrecacheLauncher::Start(JNIEnv* env, jobject obj) {
-  // TODO(bengr): Add integration tests for the whole feature.
-  Profile* profile = GetProfile();
-  PrecacheManager* precache_manager = GetPrecacheManager(profile);
-  scoped_refptr<history::TopSites> ts = TopSitesFactory::GetForProfile(profile);
-  precache::MostVisitedURLsProvider url_list_provider(ts.get());
-
-  if (!IsDataReductionProxyEnabled(profile)) {
-    Java_PrecacheLauncher_onPrecacheCompletedCallback(
-        env, weak_java_precache_launcher_.get(env).obj());
-    return;
-  }
-
-  precache_manager->StartPrecaching(
-      base::Bind(&PrecacheLauncher::OnPrecacheCompleted,
-                 weak_factory_.GetWeakPtr()),
-      &url_list_provider);
-}
-
-void PrecacheLauncher::Cancel(JNIEnv* env, jobject obj) {
-  Profile* profile = GetProfile();
-  PrecacheManager* precache_manager = GetPrecacheManager(profile);
-
-  precache_manager->CancelPrecaching();
-}
-
-void PrecacheLauncher::OnPrecacheCompleted() {
-  JNIEnv* env = AttachCurrentThread();
-  Java_PrecacheLauncher_onPrecacheCompletedCallback(
-      env, weak_java_precache_launcher_.get(env).obj());
-}
-
-static jlong Init(JNIEnv* env, jobject obj) {
-  return reinterpret_cast<intptr_t>(new PrecacheLauncher(env, obj));
-}
-
-static jboolean IsPrecachingEnabled(JNIEnv* env, jclass clazz) {
-  return PrecacheManager::IsPrecachingEnabled();
-}
-
-bool RegisterPrecacheLauncher(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}