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

chrome/browser/android/tab_android.h

Index: chrome/browser/android/tab_android.h
diff --git a/chrome/browser/android/tab_android.h b/chrome/browser/android/tab_android.h
index b9e4a874439e082b0a4e639be9bea24820ac3675..91077766da979b92df5ba55b5b3d86a85f0f1f5d 100644
--- a/chrome/browser/android/tab_android.h
+++ b/chrome/browser/android/tab_android.h
@@ -14,6 +14,7 @@
 #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"
@@ -23,6 +24,9 @@
 #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;
@@ -51,7 +55,8 @@ 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
@@ -255,6 +260,10 @@ class TabAndroid : public CoreTabHelperDelegate,
       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();
@@ -264,9 +273,29 @@ class TabAndroid : public CoreTabHelperDelegate,
   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.
@@ -289,6 +318,13 @@ class TabAndroid : public CoreTabHelperDelegate,
   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);
 };