Revert of cc: Add mailbox support to ResourceProvider write locks.

cc/test/fake_tile_manager.cc

Index: cc/test/fake_tile_manager.cc
diff --git a/cc/test/fake_tile_manager.cc b/cc/test/fake_tile_manager.cc
index ceb77d667e26ae31c78d86502bd9fa55c2ab9231..8cf984204b55f9eff5daf738e109e31d98c751e8 100644
--- a/cc/test/fake_tile_manager.cc
+++ b/cc/test/fake_tile_manager.cc
@@ -23,9 +23,6 @@
 base::LazyInstance<FakeTileTaskManagerImpl> g_fake_tile_task_manager =
     LAZY_INSTANCE_INITIALIZER;
 
-base::LazyInstance<FakeRasterBufferProviderImpl> g_fake_raster_buffer_provider =
-    LAZY_INSTANCE_INITIALIZER;
-
 }  // namespace
 
 FakeTileManager::FakeTileManager(TileManagerClient* client)
@@ -39,7 +36,6 @@
           LayerTreeSettings().software_decoded_image_budget_bytes) {
   SetResources(
       nullptr, &image_decode_controller_, g_fake_tile_task_manager.Pointer(),
-      g_fake_raster_buffer_provider.Pointer(),
       std::numeric_limits<size_t>::max(), false /* use_gpu_rasterization */);
 }
 
@@ -55,7 +51,6 @@
           LayerTreeSettings().software_decoded_image_budget_bytes) {
   SetResources(resource_pool, &image_decode_controller_,
                g_fake_tile_task_manager.Pointer(),
-               g_fake_raster_buffer_provider.Pointer(),
                std::numeric_limits<size_t>::max(),
                false /* use_gpu_rasterization */);
 }