Move willEnterFullscreen to WebRemoteFrame.

third_party/WebKit/public/web/WebRemoteFrame.h

 // Copyright 2014 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 WebRemoteFrame_h
 #define WebRemoteFrame_h
 
 #include "public/web/WebContentSecurityPolicy.h"
 #include "public/web/WebFrame.h"
 #include "public/web/WebSandboxFlags.h"
@@ skipping 44 matching lines @@
     virtual void setReplicatedPotentiallyTrustworthyUniqueOrigin(bool) const = 0;
 
     virtual void DispatchLoadEventForFrameOwner() const = 0;
 
     virtual void didStartLoading() = 0;
     virtual void didStopLoading() = 0;
 
     // Returns true if this frame should be ignored during hittesting.
     virtual bool isIgnoredForHitTest() const = 0;
 
+    // This is called in OOPIF scenarios when an element contained in this
+    // frame is about to enter fullscreen.  This frame's owner
+    // corresponds to the HTMLFrameOwnerElement to be fullscreened. Calling
+    // this prepares FullscreenController to enter fullscreen for that frame
+    // owner.
+    virtual void willEnterFullScreen() = 0;
+
     // Temporary method to allow embedders to get the script context of a
     // remote frame. This should only be used by legacy code that has not yet
     // migrated over to the new OOPI infrastructure.
     virtual v8::Local<v8::Context> deprecatedMainWorldScriptContext() const = 0;
 
 protected:
     explicit WebRemoteFrame(WebTreeScopeType scope) : WebFrame(scope) { }
 
     // Inherited from WebFrame, but intentionally hidden: it never makes sense
     // to call these on a WebRemoteFrame.
     bool isWebLocalFrame() const override = 0;
     WebLocalFrame* toWebLocalFrame() override = 0;
     bool isWebRemoteFrame() const override = 0;
     WebRemoteFrame* toWebRemoteFrame() override = 0;
 };
 
 } // namespace blink
 
 #endif // WebRemoteFrame_h