cc: Plumbing for BeginFrameSource based on Surfaces

This patch makes a stable decision about which Display a Surface
belongs to and notifies the corresponding SurfaceFactoryClient
of the BeginFrameSource belonging to that Display.

The stable decision is based on the sorted order of Display
pointers that the Surface currently belongs to.

This is only plumbing - the actual endpoints (BeginFrameSource
to use and what to do with that BeginFrameSource) still need
to be hooked up.

R=jbauman,mithro
BUG=401331, 471411
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1304063014

Cr-Commit-Position: refs/heads/master@{#355140}

1 files changed, 5 insertions, 0 deletions

diff --git a/cc/surfaces/surface_factory.h b/cc/surfaces/surface_factory.h
index 762d5a2..1347728 100644
--- a/cc/surfaces/surface_factory.h
+++ b/cc/surfaces/surface_factory.h
@@ -23,6 +23,7 @@ class Size;
 }
 
 namespace cc {
+class BeginFrameSource;
 class CopyOutputRequest;
 class Surface;
 class SurfaceFactoryClient;
@@ -46,6 +47,10 @@ class CC_SURFACES_EXPORT SurfaceFactory
   void Create(SurfaceId surface_id);
   void Destroy(SurfaceId surface_id);
   void DestroyAll();
+
+  void SetBeginFrameSource(SurfaceId surface_id,
+                           BeginFrameSource* begin_frame_source);
+
   // A frame can only be submitted to a surface created by this factory,
   // although the frame may reference surfaces created by other factories.
   // The callback is called the first time this frame is used to draw, or if