cc: Introduce mechanism to observe CompositorFrames submitted to new surfaceIDs

cc/surfaces/surface_manager_observer.h

Index: cc/surfaces/surface_manager_observer.h
diff --git a/cc/surfaces/surface_manager_observer.h b/cc/surfaces/surface_manager_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..c839809614b56c0ef3bd4a25518ff6859dfff6f0
--- /dev/null
+++ b/cc/surfaces/surface_manager_observer.h
@@ -0,0 +1,31 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.

[vmpstr, 2016/10/11 21:59:04]

nit: 2016 (although I know this is just renaming files...)

[Fady Samuel, 2016/10/11 23:11:45]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_SURFACES_SURFACE_MANAGER_OBSERVER_H_
+#define CC_SURFACES_SURFACE_MANAGER_OBSERVER_H_
+
+namespace gfx {
+class Size;
+}
+
+namespace cc {
+
+class SurfaceId;
+
+class SurfaceManagerObserver {

[enne (OOO), 2016/10/12 00:07:20]

bikeshed: what about just SurfaceObserver? Is that too ambiguous?

[Fady Samuel, 2016/10/12 00:34:27]

Done.

+ public:
+  // Runs when a CompositorFrame is received for the given |surface_id| for the
+  // first time.
+  virtual void OnSurfaceCreated(const SurfaceId& surface_id,
+                                const gfx::Size& frame_size,
+                                float device_scale_factor) = 0;
+
+  // Runs when a Surface is damaged. *changed should be set to true if this
+  // causes a Display to be damaged.
+  virtual void OnSurfaceDamaged(const SurfaceId& surface_id, bool* changed) = 0;
+};
+
+}  // namespace cc
+
+#endif  // CC_SURFACES_SURFACE_MANAGER_OBSERVER_H_