Add DisplayCompositorTest.

cc/surfaces/surface_manager.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 CC_SURFACES_SURFACE_MANAGER_H_
 #define CC_SURFACES_SURFACE_MANAGER_H_
 
 #include <stdint.h>
 
 #include <list>
 #include <memory>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/threading/thread_checker.h"
 #include "cc/surfaces/frame_sink_id.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_observer.h"
+#include "cc/surfaces/surface_reference_manager.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "cc/surfaces/surfaces_export.h"
 
 namespace cc {
 class BeginFrameSource;
 class CompositorFrame;
 class Surface;
 class SurfaceFactoryClient;
 
-class CC_SURFACES_EXPORT SurfaceManager {
+class CC_SURFACES_EXPORT SurfaceManager : public SurfaceReferenceManager {
  public:
   SurfaceManager();
-  ~SurfaceManager();
+  ~SurfaceManager() override;
 
   void RegisterSurface(Surface* surface);
   void DeregisterSurface(const SurfaceId& surface_id);
 
   // Destroy the Surface once a set of sequence numbers has been satisfied.
   void Destroy(std::unique_ptr<Surface> surface);
 
   Surface* GetSurfaceForId(const SurfaceId& surface_id);
 
   void AddObserver(SurfaceObserver* obs) { observer_list_.AddObserver(obs); }
@@ skipping 14 matching lines @@
   // id namespace.
   void DidSatisfySequences(const FrameSinkId& frame_sink_id,
                            std::vector<uint32_t>* sequence);
 
   void RegisterFrameSinkId(const FrameSinkId& frame_sink_id);
 
   // Invalidate a frame_sink_id that might still have associated sequences,
   // possibly because a renderer process has crashed.
   void InvalidateFrameSinkId(const FrameSinkId& frame_sink_id);
 
-  // Adds a reference from a parent surface to a child surface. Any surface
-  // embedding a child surface should have a reference added so that the child
-  // surface is not garbage collected until after the parent surface.
-  void AddSurfaceReference(const SurfaceId& parent_id,
-                           const SurfaceId& child_id);
-
-  // Removes a reference from a parent surface to a child surface.
-  void RemoveSurfaceReference(const SurfaceId& parent_id,
-                              const SurfaceId& child_id);
-
-  // Returns the number of surfaces that have references to |surface_id|. When
-  // the count is zero nothing is referencing the surface and it may be garbage
-  // collected.
-  size_t GetSurfaceReferenceCount(const SurfaceId& surface_id) const;
-
-  // Returns the number of surfaces that |surface_id| has references to.
-  size_t GetReferencedSurfaceCount(const SurfaceId& surface_id) const;
-
   // SurfaceFactoryClient, hierarchy, and BeginFrameSource can be registered
   // and unregistered in any order with respect to each other.
   //
   // This happens in practice, e.g. the relationship to between ui::Compositor /
   // DelegatedFrameHost is known before ui::Compositor has a surface/client).
   // However, DelegatedFrameHost can register itself as a client before its
   // relationship with the ui::Compositor is known.
 
   // Associates a SurfaceFactoryClient with the surface id frame_sink_id it
   // uses.
@@ skipping 14 matching lines @@
 
   // Register a relationship between two namespaces.  This relationship means
   // that surfaces from the child namespace will be displayed in the parent.
   // Children are allowed to use any begin frame source that their parent can
   // use.
   void RegisterFrameSinkHierarchy(const FrameSinkId& parent_frame_sink_id,
                                   const FrameSinkId& child_frame_sink_id);
   void UnregisterFrameSinkHierarchy(const FrameSinkId& parent_frame_sink_id,
                                     const FrameSinkId& child_frame_sink_id);
 
-  const SurfaceId& GetRootSurfaceId() { return kRootSurfaceId; }
+  // SurfaceReferenceManager:
+  const SurfaceId& GetRootSurfaceId() const override;
+  void AddSurfaceReference(const SurfaceId& parent_id,
+                           const SurfaceId& child_id) override;
+  void RemoveSurfaceReference(const SurfaceId& parent_id,
+                              const SurfaceId& child_id) override;
+  size_t GetSurfaceReferenceCount(const SurfaceId& surface_id) const override;
+  size_t GetReferencedSurfaceCount(const SurfaceId& surface_id) const override;
 
  private:
   void RecursivelyAttachBeginFrameSource(const FrameSinkId& frame_sink_id,
                                          BeginFrameSource* source);
   void RecursivelyDetachBeginFrameSource(const FrameSinkId& frame_sink_id,
                                          BeginFrameSource* source);
   // Returns true if |child namespace| is or has |search_frame_sink_id| as a
   // child.
   bool ChildContains(const FrameSinkId& child_frame_sink_id,
                      const FrameSinkId& search_frame_sink_id) const;
@@ skipping 60 matching lines @@
   // Root SurfaceId that references display root surfaces. There is no Surface
   // with this id, it's for bookkeeping purposes only.
   const SurfaceId kRootSurfaceId;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_SURFACE_MANAGER_H_