Create a skeleton AppBannerManager class

chrome/browser/android/banners/app_banner_manager.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/banners/app_banner_manager.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/command_line.h"
+#include "chrome/browser/android/banners/app_banner_settings_helper.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_switches.h"
+#include "content/public/browser/android/content_view_core.h"
+#include "content/public/browser/navigation_details.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/frame_navigate_params.h"
+#include "jni/AppBannerManager_jni.h"
+#include "ui/gfx/android/java_bitmap.h"
+
+using base::android::ConvertJavaStringToUTF8;
+using base::android::ConvertUTF8ToJavaString;
+
+namespace {
+const char kBannerTag[] = "google-play-id";
+}
+
+AppBannerManager::AppBannerManager(JNIEnv* env, jobject obj)
+    : MetaTagObserver(kBannerTag),
+      weak_java_banner_view_manager_(env, obj) {}
+
+AppBannerManager::~AppBannerManager() {
+}
+
+void AppBannerManager::Destroy(JNIEnv* env, jobject obj) {
+  delete this;
+}
+
+void AppBannerManager::ReplaceWebContents(JNIEnv* env,
+                                          jobject obj,
+                                          jobject jweb_contents) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(jweb_contents);
+  Observe(web_contents);
+}
+
+void AppBannerManager::DidNavigateMainFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& params) {
+  // TODO(dfalcantara): Get rid of the current banner.
+}
+
+void AppBannerManager::HandleMetaTagContent(const std::string& tag_content,
+                                            const GURL& expected_url) {
+  DCHECK(web_contents());
+
+  if (!AppBannerSettingsHelper::IsAllowed(web_contents(),
+                                          expected_url,
+                                          tag_content)) {
+    return;
+  }
+
+  // TODO(dfalcantara): Send the info to the Java side to begin building the
+  //                    app banner.
+}
+
+jlong Init(JNIEnv* env, jobject obj) {
+  AppBannerManager* manager = new AppBannerManager(env, obj);
+  return reinterpret_cast<intptr_t>(manager);
+}
+
+jboolean IsEnabled(JNIEnv* env, jclass clazz) {
+  return false;
+
+  // TODO(dfalcantara): Enable this when more of the pipeline is checked in.
+  // return !CommandLine::ForCurrentProcess()->HasSwitch(
+  //     switches::kDisableAppBanners);
+}
+
+// Register native methods
+bool RegisterAppBannerManager(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}