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);
+}