Convert FullscreenController to use WebCallbacks

third_party/WebKit/Source/core/dom/FullscreenCallbacks.h

Index: third_party/WebKit/Source/core/dom/FullscreenCallbacks.h
diff --git a/third_party/WebKit/Source/core/dom/FullscreenCallbacks.h b/third_party/WebKit/Source/core/dom/FullscreenCallbacks.h
new file mode 100644
index 0000000000000000000000000000000000000000..98d8901a5f8efcdf8b04616b6fc49f8aae22d245
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/FullscreenCallbacks.h
@@ -0,0 +1,19 @@
+// Copyright 2016 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 FullscreenCallbacks_h
+#define FullscreenCallbacks_h
+
+namespace blink {
+
+class FullscreenCallbacks {

[mlamouri (slow - plz ping), 2016/12/01 10:31:03]

Any reason why you don't make this RequestFullscreenCallbacks instead of having
this interface that is used only once?

[foolip, 2016/12/01 10:52:59]

A remnant from when I used callbacks also for exiting. I may have to put that
back, but if not I'll simplify as suggested.

+ public:
+  virtual ~FullscreenCallbacks() = default;
+  virtual void onSuccess() = 0;
+  virtual void onError() = 0;
+};
+
+}  // namespace blink
+
+#endif  // FullscreenCallbacks_h