chrome/blink: Add functionality for in-product help for media elements.

chrome/browser/android/tab_android.h

 // Copyright (c) 2012 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_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/callback_forward.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/sync/glue/synced_tab_delegate_android.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "components/favicon/core/favicon_driver_observer.h"
 #include "components/infobars/core/infobar_manager.h"
 #include "components/sessions/core/session_id.h"
 #include "components/toolbar/toolbar_model.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "services/service_manager/public/cpp/binder_registry.h"
+#include "third_party/WebKit/public/platform/media_download_in_product_help.mojom.h"
 
 class GURL;
 class Profile;
 
 namespace cc {
 class Layer;
 }
 
 namespace chrome {
 struct NavigateParams;
 }
 
 namespace android {
 class TabWebContentsDelegateAndroid;
 class TabContentManager;
 }
 
 namespace content {
 class DevToolsAgentHost;
 class WebContents;
 }
 
 namespace prerender {
 class PrerenderManager;
 }
 
 class TabAndroid : public CoreTabHelperDelegate,
                    public content::NotificationObserver,
-                   public favicon::FaviconDriverObserver {
+                   public favicon::FaviconDriverObserver,
+                   public content::WebContentsObserver {
  public:
   // A Java counterpart will be generated for this enum.
   // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser
   enum TabLoadStatus {
     PAGE_LOAD_FAILED = 0,
     DEFAULT_PAGE_LOAD = 1,
     PARTIAL_PRERENDERED_PAGE_LOAD = 2,
     FULL_PRERENDERED_PAGE_LOAD = 3,
   };
 
@@ skipping 183 matching lines @@
 
   const std::string& GetWebappManifestScope() const {
     return webapp_manifest_scope_;
   }
 
   void EnableEmbeddedMediaExperience(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       jboolean enabled);
 
+  void MediaDownloadInProductHelpDismissed(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj);
+
   bool ShouldEnableEmbeddedMediaExperience() const;
 
   scoped_refptr<content::DevToolsAgentHost> GetDevToolsAgentHost();
 
   void SetDevToolsAgentHost(scoped_refptr<content::DevToolsAgentHost> host);
 
   void AttachDetachedTab(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& obj);
 
+  // Register the Tab's native methods through JNI.
+  static bool RegisterTabAndroid(JNIEnv* env);
+
+  // content::WebContents implementation.
+  void OnInterfaceRequestFromFrame(
+      content::RenderFrameHost* render_frame_host,
+      const std::string& interface_name,
+      mojo::ScopedMessagePipeHandle* interface_pipe) override;
+  void RenderFrameDeleted(content::RenderFrameHost* render_frame_host) override;
+
  private:
+  class MediaDownloadInProductHelp;
+
   prerender::PrerenderManager* GetPrerenderManager() const;
 
+  // methods used by MediaDownloadInProductHelp.
+  void CreateInProductHelpService(
+      blink::mojom::MediaDownloadInProductHelpRequest request,
+      content::RenderFrameHost* render_frame_host);
+  void ShowMediaDownloadInProductHelp(const gfx::Rect& rect_in_frame);
+  void DismissMediaDownloadInProductHelp();
+  void OnMediaDownloadInProductHelpConnectionError();
+
   JavaObjectWeakGlobalRef weak_java_tab_;
 
   // The identifier used by session restore for this tab.
   SessionID session_tab_id_;
 
   // Identifier of the window the tab is in.
   SessionID session_window_id_;
 
   content::NotificationRegistrar notification_registrar_;
 
   scoped_refptr<cc::Layer> content_layer_;
   android::TabContentManager* tab_content_manager_;
 
   std::unique_ptr<content::WebContents> web_contents_;
   std::unique_ptr<android::TabWebContentsDelegateAndroid>
       web_contents_delegate_;
   scoped_refptr<content::DevToolsAgentHost> devtools_host_;
   std::unique_ptr<browser_sync::SyncedTabDelegateAndroid> synced_tab_delegate_;
 
   std::string webapp_manifest_scope_;
   bool embedded_media_experience_enabled_;
 
+  std::unique_ptr<MediaDownloadInProductHelp> media_in_product_help_;
+
+  service_manager::BinderRegistryWithArgs<content::RenderFrameHost*>
+      frame_interfaces_;
+
+  base::WeakPtrFactory<TabAndroid> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(TabAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_