Don't show media controls when there is a persistent video.

content/browser/web_contents/web_contents_impl.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 CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 546 matching lines @@
   SessionStorageNamespace* GetSessionStorageNamespace(
       SiteInstance* instance) override;
   SessionStorageNamespaceMap GetSessionStorageNamespaceMap() override;
   double GetPendingPageZoomLevel() override;
   FrameTree* GetFrameTree() override;
   void SetIsVirtualKeyboardRequested(bool requested) override;
   bool IsVirtualKeyboardRequested() override;
   bool IsOverridingUserAgent() override;
   bool IsJavaScriptDialogShowing() const override;
   bool HideDownloadUI() const override;
+  bool HasPersistentVideo() const override;
 
   // NavigatorDelegate ---------------------------------------------------------
 
   void DidStartNavigation(NavigationHandle* navigation_handle) override;
   void DidRedirectNavigation(NavigationHandle* navigation_handle) override;
   void ReadyToCommitNavigation(NavigationHandle* navigation_handle) override;
   void DidFinishNavigation(NavigationHandle* navigation_handle) override;
   void DidStartProvisionalLoad(RenderFrameHostImpl* render_frame_host,
                                const GURL& validated_url,
                                bool is_error_page) override;
@@ skipping 209 matching lines @@
   void NotifyFindReply(int request_id,
                        int number_of_matches,
                        const gfx::Rect& selection_rect,
                        int active_match_ordinal,
                        bool final_update);
 
   // Modify the counter of connected devices for this WebContents.
   void IncrementBluetoothConnectedDeviceCount();
   void DecrementBluetoothConnectedDeviceCount();
 
+  // Called when the WebContents gains or loses a persistent video.
+  void SetHasPersistentVideo(bool value);
+
 #if defined(OS_ANDROID)
   // Called by FindRequestManager when all of the find match rects are in.
   void NotifyFindMatchRectsReply(int version,
                                  const std::vector<gfx::RectF>& rects,
                                  const gfx::RectF& active_rect);
 #endif
 
  private:
   friend class WebContentsObserver;
   friend class WebContents;  // To implement factory methods.
@@ skipping 361 matching lines @@
   // Returns the FindRequestManager, or creates one if it doesn't already exist.
   FindRequestManager* GetOrCreateFindRequestManager();
 
   // Removes a registered WebContentsBindingSet by interface name.
   void RemoveBindingSet(const std::string& interface_name);
 
   // Prints a console warning when visiting a localhost site with a bad
   // certificate via --allow-insecure-localhost.
   void ShowInsecureLocalhostWarningIfNeeded();
 
+  // Notify the RenderViewHost that the preferences have changed. This will send

[nasko, 2017/02/13 22:28:42]

Let's avoid using RenderViewHost, as it is currently an implementation detail
and that will change soon. It should be semantically the same comment if we do
s/RenderViewHost/this WebContents/.

[mlamouri (slow - plz ping), 2017/02/14 11:19:46]

Done.

+  // an IPC to all the renderer process associated with this WebContents.
+  void NotifyPreferencesChanged();
+
   // Data for core operation ---------------------------------------------------
 
   // Delegate for notifying our owner about stuff. Not owned by us.
   WebContentsDelegate* delegate_;
 
   // Handles the back/forward list and loading.
   NavigationControllerImpl controller_;
 
   // The corresponding view.
   std::unique_ptr<WebContentsView> view_;
@@ skipping 306 matching lines @@
 
 #if defined(OS_ANDROID)
   std::unique_ptr<service_manager::InterfaceProvider> java_interfaces_;
 #endif
 
   // Whether this WebContents is for content overlay.
   bool is_overlay_content_;
 
   int currently_playing_video_count_ = 0;
 
+  bool has_persistent_video_ = false;
+
   base::WeakPtrFactory<WebContentsImpl> loading_weak_factory_;
   base::WeakPtrFactory<WebContentsImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 // Dangerous methods which should never be made part of the public API, so we
 // grant their use only to an explicit friend list (c++ attorney/client idiom).
 class CONTENT_EXPORT WebContentsImpl::FriendZone {
  private:
   friend class TestNavigationObserver;
   friend class WebContentsAddedObserver;
   friend class ContentBrowserSanityChecker;
 
   FriendZone();  // Not instantiable.
 
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendZone);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_