cc: Adding support for RGBA_4444 tile textures

cc/resources/tile_manager.cc

Index: cc/resources/tile_manager.cc
diff --git a/cc/resources/tile_manager.cc b/cc/resources/tile_manager.cc
index 50668c01f8dc52cabaae57d9363e0e96e0a62ebc..84e90bf2f399f6f9b4aad7ef5e5ebf9e465dafaa 100644
--- a/cc/resources/tile_manager.cc
+++ b/cc/resources/tile_manager.cc
@@ -153,7 +153,8 @@ TileManager::TileManager(
       resources_releasable_(0),
       ever_exceeded_memory_budget_(false),
       rendering_stats_instrumentation_(rendering_stats_instrumentation),
-      did_initialize_visible_tile_(false) {
+      did_initialize_visible_tile_(false),
+      use_16_bit_tiles_(resource_provider->use_16bit_textures()) {
   raster_worker_pool_->SetClient(this);
 }
 
@@ -737,7 +738,8 @@ RasterWorkerPool::RasterTask TileManager::CreateRasterTask(Tile* tile) {
   scoped_ptr<ResourcePool::Resource> resource =
       resource_pool_->AcquireResource(
           tile->tile_size_.size(),
-          raster_worker_pool_->GetResourceFormat());
+          raster_worker_pool_->GetResourceFormat(),
+          use_16_bit_tiles_);
   const Resource* const_resource = resource.get();
 
   // Create and queue all image decode tasks that this tile depends on.
@@ -781,7 +783,8 @@ RasterWorkerPool::RasterTask TileManager::CreateRasterTask(Tile* tile) {
                  tile->id(),
                  base::Passed(&resource),
                  mts.raster_mode),
-      &decode_tasks);
+      &decode_tasks,
+      use_16_bit_tiles_);
 }
 
 void TileManager::OnImageDecodeTaskCompleted(