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 53236c5ef7c8d0c4d990044c629735de2329c4c0..3d29d487e3f6fbee79dc82952f67a09d5580bfd9 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)
@@ -38,7 +35,6 @@
           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 */);
 }
 
@@ -53,7 +49,6 @@
           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 */);
 }