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

third_party/WebKit/Source/core/frame/LocalFrame.h

Index: third_party/WebKit/Source/core/frame/LocalFrame.h
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.h b/third_party/WebKit/Source/core/frame/LocalFrame.h
index 1c3e5738b25e16ab1e18c94ffb99aadfb2d5ec81..c34fad512795a035ff7ae2e69f3c43046a88a13b 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.h
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.h
@@ -63,6 +63,7 @@ class FrameResourceCoordinator;
 class FrameSelection;
 class InputMethodController;
 class CoreProbeSink;
+class HTMLMediaElement;
 class InterfaceProvider;
 class InterfaceRegistry;
 class IntPoint;
@@ -129,6 +130,11 @@ class CORE_EXPORT LocalFrame final : public Frame,
   void DetachChildren();
   void DocumentAttached();
 
+  void ShowDownloadMediaInProductHelp(HTMLMediaElement&);
+  bool IsDownloadMediaInProductHelpVisibleForElement(HTMLMediaElement&);
+  void LayoutUpdated();
+  void NotifyInProductHelpDismissed();
+
   Frame* FindFrameForNavigation(const AtomicString& name,
                                 LocalFrame& active_frame);
 
@@ -327,6 +333,10 @@ class CORE_EXPORT LocalFrame final : public Frame,
 
   IntRect remote_viewport_intersection_;
   Member<FrameResourceCoordinator> frame_resource_coordinator_;
+
+  // Restricts showing the download media in-product help to once per frame.
+  bool media_in_product_help_shown_for_frame_ = false;
+  WeakMember<HTMLMediaElement> element_with_active_in_product_help_;
 };
 
 inline FrameLoader& LocalFrame::Loader() const {