cc: Partial tile update for one-copy raster.

cc/tiles/tile_manager_perftest.cc

Index: cc/tiles/tile_manager_perftest.cc
diff --git a/cc/tiles/tile_manager_perftest.cc b/cc/tiles/tile_manager_perftest.cc
index 6ce43b0f82144fe1854254bacb13f9531d198ae4..12378ea4d2124adcbaf22738869c4097885dfffa 100644
--- a/cc/tiles/tile_manager_perftest.cc
+++ b/cc/tiles/tile_manager_perftest.cc
@@ -71,7 +71,9 @@ class FakeTileTaskRunnerImpl : public TileTaskRunner, public TileTaskClient {
 
   // Overridden from TileTaskClient:
   scoped_ptr<RasterBuffer> AcquireBufferForRaster(
-      const Resource* resource) override {
+      const Resource* resource,
+      uint64_t new_content_id,
+      uint64_t previous_content_id) override {
     return nullptr;
   }
   void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) override {}