(not for commit) Simplified multi-threaded Ganesh with lock on Flush only.

cc/resources/tile_task_worker_pool_perftest.cc

Index: cc/resources/tile_task_worker_pool_perftest.cc
diff --git a/cc/resources/tile_task_worker_pool_perftest.cc b/cc/resources/tile_task_worker_pool_perftest.cc
index 483b71f3add5593dfbc719cc91cfb1ae3cbd85ee..4b89c2977c40085da61c77807262037edf9d56a4 100644
--- a/cc/resources/tile_task_worker_pool_perftest.cc
+++ b/cc/resources/tile_task_worker_pool_perftest.cc
@@ -392,9 +392,10 @@ class TileTaskWorkerPoolPerfTest
   void Create3dOutputSurfaceAndResourceProvider() {
     output_surface_ = FakeOutputSurface::Create3d(context_provider_).Pass();
     CHECK(output_surface_->BindToClient(&output_surface_client_));
-    resource_provider_ = ResourceProvider::Create(output_surface_.get(), NULL,
-                                                  &gpu_memory_buffer_manager_,
-                                                  NULL, 0, false, 1).Pass();
+    resource_provider_ =
+        ResourceProvider::Create(output_surface_.get(), NULL,
+                                 &gpu_memory_buffer_manager_, NULL, 0, false,
+                                 false, 1).Pass();
   }
 
   void CreateSoftwareOutputSurfaceAndResourceProvider() {
@@ -403,7 +404,7 @@ class TileTaskWorkerPoolPerfTest
     CHECK(output_surface_->BindToClient(&output_surface_client_));
     resource_provider_ =
         ResourceProvider::Create(output_surface_.get(), &shared_bitmap_manager_,
-                                 NULL, NULL, 0, false, 1).Pass();
+                                 NULL, NULL, 0, false, false, 1).Pass();
   }
 
   std::string TestModifierString() const {
@@ -474,7 +475,7 @@ class TileTaskWorkerPoolCommonPerfTest : public TileTaskWorkerPoolPerfTestBase,
     CHECK(output_surface_->BindToClient(&output_surface_client_));
     resource_provider_ =
         ResourceProvider::Create(output_surface_.get(), NULL, NULL, NULL, 0,
-                                 false, 1).Pass();
+                                 false, false, 1).Pass();
   }
 
   void RunBuildTileTaskQueueTest(const std::string& test_name,