cc: Never make a DirectRenderer in LayerTreeHostImpl.

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 35 matching lines @@
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/layer_iterator.h"
 #include "cc/layers/painted_scrollbar_layer_impl.h"
 #include "cc/layers/render_surface_impl.h"
 #include "cc/layers/scrollbar_layer_impl_base.h"
 #include "cc/layers/surface_layer_impl.h"
 #include "cc/layers/viewport.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/delegating_renderer.h"
-#include "cc/output/gl_renderer.h"
-#include "cc/output/software_renderer.h"
 #include "cc/output/texture_mailbox_deleter.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/raster/bitmap_raster_buffer_provider.h"
 #include "cc/raster/gpu_raster_buffer_provider.h"
 #include "cc/raster/one_copy_raster_buffer_provider.h"
 #include "cc/raster/raster_buffer_provider.h"
 #include "cc/raster/synchronous_task_graph_runner.h"
@@ skipping 2038 matching lines @@
     pending_tree_->RecreateResources();
   if (recycle_tree_)
     recycle_tree_->RecreateResources();
 }
 
 void LayerTreeHostImpl::CreateAndSetRenderer() {
   DCHECK(!renderer_);
   DCHECK(output_surface_);
   DCHECK(resource_provider_);
 
-  if (output_surface_->capabilities().delegated_rendering) {
-    renderer_ =
-        DelegatingRenderer::Create(this, &settings_.renderer_settings,
-                                   output_surface_, resource_provider_.get());
-  } else if (output_surface_->context_provider()) {
-    renderer_ = GLRenderer::Create(
-        this, &settings_.renderer_settings, output_surface_,
-        resource_provider_.get(), texture_mailbox_deleter_.get(),
-        settings_.renderer_settings.highp_threshold_min);
-  } else if (output_surface_->software_device()) {
-    renderer_ =
-        SoftwareRenderer::Create(this, &settings_.renderer_settings,
+  DCHECK(output_surface_->capabilities().delegated_rendering);
+  renderer_ =
+      DelegatingRenderer::Create(this, &settings_.renderer_settings,
                                  output_surface_, resource_provider_.get());
-  }
-  DCHECK(renderer_);
-
   renderer_->SetVisible(visible_);
   SetFullRootLayerDamage();
 
   // See note in LayerTreeImpl::UpdateDrawProperties.  Renderer needs to be
   // initialized to get max texture size.  Also, after releasing resources,
   // trees need another update to generate new ones.
   active_tree_->set_needs_update_draw_properties();
   if (pending_tree_)
     pending_tree_->set_needs_update_draw_properties();
   client_->UpdateRendererCapabilitiesOnImplThread();
@@ skipping 1895 matching lines @@
   return task_runner_provider_->HasImplThread();
 }
 
 bool LayerTreeHostImpl::CommitToActiveTree() const {
   // In single threaded mode we skip the pending tree and commit directly to the
   // active tree.
   return !task_runner_provider_->HasImplThread();
 }
 
 }  // namespace cc