Remove FullscreenIsGranted API from WebFrameWidget.

Checking that the fullscreen element is non-null implicitly means that
fullscreen has already been granted.

Verified via:
out/Release/chrome --register-pepper-plugins="out/Release/libppapi_example_mouse_lock.so;application/x-ppapi-example-mouse-lock"

BUG=1097816

Change-Id: I125da5db68346f5cc90279110ce676c70cf27c0f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2488124
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819148}

content/renderer/pepper/pepper_plugin_instance_impl.cc

@@ -1247,9 +1247,6 @@ void PepperPluginInstanceImpl::ViewChanged(
   if (desired_fullscreen_state_ || view_data_.is_fullscreen) {
     bool is_fullscreen_element = container_->IsFullscreenElement();
     if (!view_data_.is_fullscreen && desired_fullscreen_state_ &&
-        render_frame()
-            ->GetLocalRootRenderWidget()
-            ->IsFullscreenGrantedForFrame() &&
         is_fullscreen_element) {
       // Entered fullscreen. Only possible via SetFullscreen().
       view_data_.is_fullscreen = true;

content/renderer/render_widget.cc

@@ -478,10 +478,4 @@ void RenderWidget::DidNavigate(ukm::SourceId source_id, const GURL& url) {
   }
 }
 
-bool RenderWidget::IsFullscreenGrantedForFrame() {
-  if (!for_frame())
-    return false;
-  return GetFrameWidget()->IsFullscreenGranted();
-}
-
 }  // namespace content

content/renderer/render_widget.h

@@ -221,9 +221,6 @@ class CONTENT_EXPORT RenderWidget
       base::OnceCallback<void(const gfx::PresentationFeedback&)>;
   virtual void RequestPresentation(PresentationTimeCallback callback);
 
-  // Determines if fullscreen is granted for the frame.
-  bool IsFullscreenGrantedForFrame();
-
  protected:
   // Destroy the RenderWidget. The |widget| is the owning pointer of |this|.
   virtual void Close(std::unique_ptr<RenderWidget> widget);

third_party/blink/public/web/web_frame_widget.h

@@ -184,9 +184,6 @@ class WebFrameWidget : public WebWidget {
   // If the widget is currently selecting a range.
   virtual bool HandlingSelectRange() = 0;
 
-  // If fullscreen has been granted.
-  virtual bool IsFullscreenGranted() = 0;
-
   // Returns true if a pinch gesture is currently active in main frame.
   virtual bool PinchGestureActiveInMainFrame() = 0;
 

third_party/blink/renderer/core/frame/web_frame_widget_base.h

@@ -322,7 +322,6 @@ class CORE_EXPORT WebFrameWidgetBase
   void CancelCompositionForPepper() override;
   void ApplyVisualProperties(
       const VisualProperties& visual_properties) override;
-  bool IsFullscreenGranted() override;
   bool PinchGestureActiveInMainFrame() override;
   float PageScaleInMainFrame() override;
   const ScreenInfo& GetScreenInfo() override;
@@ -616,6 +615,9 @@ class CORE_EXPORT WebFrameWidgetBase
   void PointerLockMouseEvent(const WebCoalescedInputEvent&);
   bool IsPointerLocked();
 
+  // The fullscreen granted status from the most recent VisualProperties update.
+  bool IsFullscreenGranted();
+
   virtual PageWidgetEventHandler* GetPageWidgetEventHandler() = 0;
 
   // Return the LocalFrameView used for animation scrolling. This is overridden