Create a skeleton AppBannerManager class

chrome/browser/android/banners/app_banner_manager.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_BANNERS_APP_BANNER_MANAGER_H_
+#define CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_MANAGER_H_
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_helper.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/android/meta_tag_observer.h"
+
+namespace content {
+struct FrameNavigateParams;
+struct LoadCommittedDetails;
+}  // namespace content
+
+/**
+ * Manages when an app banner is created or dismissed.
+ *
+ * Hooks the wiring together for getting the data for a particular app.
+ * Monitors at most one package at a time, and tracks the info for the
+ * most recent app that was requested.  Any work in progress for other apps is
+ * discarded.
+ */
+class AppBannerManager : public MetaTagObserver {
+ public:
+  AppBannerManager(JNIEnv* env, jobject obj);
+  virtual ~AppBannerManager();
+
+  // Destroys the AppBannerManager.
+  void Destroy(JNIEnv* env, jobject obj);
+
+  // Observes a new WebContents, if necessary.
+  void ReplaceWebContents(JNIEnv* env,
+                          jobject obj,
+                          jobject jweb_contents);
+
+  // WebContentsObserver overrides.
+  virtual void DidNavigateMainFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) OVERRIDE;
+
+ private:
+  // Kicks off the process of showing a banner for the package designated by
+  // |tag_content| on the page at the |expected_url|.
+  virtual void HandleMetaTagContent(const std::string& tag_content,
+                                    const GURL& expected_url) OVERRIDE;
+
+  JavaObjectWeakGlobalRef weak_java_banner_view_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppBannerManager);
+};  // class AppBannerManager
+
+// Register native methods
+bool RegisterAppBannerManager(JNIEnv* env);
+
+#endif  // CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_MANAGER_H_