cc: Refactor how picture layers are exposed to the tile manager.

cc/resources/tile_manager_perftest.cc

Index: cc/resources/tile_manager_perftest.cc
diff --git a/cc/resources/tile_manager_perftest.cc b/cc/resources/tile_manager_perftest.cc
index c7fa68f04e47bffb88e6f13873221bb00fdcb12a..0ac79b16de61294b35e9d4cf7a7707ccb40d67f2 100644
--- a/cc/resources/tile_manager_perftest.cc
+++ b/cc/resources/tile_manager_perftest.cc
@@ -76,12 +76,11 @@ class FakeRasterizerImpl : public Rasterizer, public RasterizerTaskClient {
 base::LazyInstance<FakeRasterizerImpl> g_fake_rasterizer =
     LAZY_INSTANCE_INITIALIZER;
 
-class TileManagerPerfTest : public testing::Test, public TileManagerClient {
+class TileManagerPerfTest : public testing::Test {
  public:
   TileManagerPerfTest()
       : memory_limit_policy_(ALLOW_ANYTHING),
         max_tiles_(10000),
-        ready_to_activate_(false),
         id_(7),
         proxy_(base::MessageLoopProxy::current()),
         host_impl_(ImplSidePaintingSettings(10000),
@@ -291,10 +290,6 @@ class TileManagerPerfTest : public testing::Test, public TileManagerClient {
         "manage_tiles", "", test_name, timer_.LapsPerSecond(), "runs/s", true);
   }
 
-  // TileManagerClient implementation.
-  virtual void NotifyReadyToActivate() OVERRIDE { ready_to_activate_ = true; }
-  virtual void NotifyTileStateChanged(const Tile* tile) OVERRIDE {}
-
   TileManager* tile_manager() { return host_impl_.tile_manager(); }
 
  protected:
@@ -303,7 +298,6 @@ class TileManagerPerfTest : public testing::Test, public TileManagerClient {
   TestSharedBitmapManager shared_bitmap_manager_;
   TileMemoryLimitPolicy memory_limit_policy_;
   int max_tiles_;
-  bool ready_to_activate_;
   int id_;
   FakeImplProxy proxy_;
   FakeLayerTreeHostImpl host_impl_;