Support different formats in the same resource pool.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 68a905eb15f888884d60e0098edb08a14064ba28..aee57cf7d30ea689abf41a0191ddb1a82e4f5869 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -2013,9 +2013,7 @@ void LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
   ContextProvider* context_provider = output_surface_->context_provider();
   if (!context_provider) {
     *resource_pool =
-        ResourcePool::Create(resource_provider_.get(),
-                             GL_TEXTURE_2D,
-                             resource_provider_->best_texture_format());
+        ResourcePool::Create(resource_provider_.get(), GL_TEXTURE_2D, false);
 
     *tile_task_worker_pool = BitmapTileTaskWorkerPool::Create(
         task_runner, TileTaskWorkerPool::GetTaskGraphRunner(),
@@ -2025,9 +2023,7 @@ void LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
 
   if (use_gpu_rasterization_) {
     *resource_pool =
-        ResourcePool::Create(resource_provider_.get(),
-                             GL_TEXTURE_2D,
-                             resource_provider_->best_texture_format());
+        ResourcePool::Create(resource_provider_.get(), GL_TEXTURE_2D, false);
 
     *tile_task_worker_pool = GpuTileTaskWorkerPool::Create(
         task_runner, TileTaskWorkerPool::GetTaskGraphRunner());
@@ -2045,8 +2041,7 @@ void LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
 
     if (settings_.use_zero_copy || IsSynchronousSingleThreaded()) {
       *resource_pool =
-          ResourcePool::Create(resource_provider_.get(), image_target,
-                               resource_provider_->best_texture_format());
+          ResourcePool::Create(resource_provider_.get(), image_target, false);
 
       TaskGraphRunner* task_graph_runner;
       if (IsSynchronousSingleThreaded()) {
@@ -2065,11 +2060,9 @@ void LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
     if (settings_.use_one_copy) {
       // We need to create a staging resource pool when using copy rasterizer.
       *staging_resource_pool =
-          ResourcePool::Create(resource_provider_.get(), image_target,
-                               resource_provider_->best_texture_format());
+          ResourcePool::Create(resource_provider_.get(), image_target, false);
       *resource_pool =
-          ResourcePool::Create(resource_provider_.get(), GL_TEXTURE_2D,
-                               resource_provider_->best_texture_format());
+          ResourcePool::Create(resource_provider_.get(), GL_TEXTURE_2D, false);
 
       *tile_task_worker_pool = OneCopyTileTaskWorkerPool::Create(
           task_runner, TileTaskWorkerPool::GetTaskGraphRunner(),
@@ -2079,9 +2072,8 @@ void LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
     }
   }
 
-  *resource_pool = ResourcePool::Create(
-      resource_provider_.get(), GL_TEXTURE_2D,
-      resource_provider_->memory_efficient_texture_format());
+  *resource_pool =
+      ResourcePool::Create(resource_provider_.get(), GL_TEXTURE_2D, true);
 
   *tile_task_worker_pool = PixelBufferTileTaskWorkerPool::Create(
       task_runner, TileTaskWorkerPool::GetTaskGraphRunner(), context_provider,