Remove NULL ResourceProvider, TileManager early outs

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 <algorithm>
 
 #include "base/basictypes.h"
 #include "base/json/json_writer.h"
@@ skipping 732 matching lines @@
   }
 
   if (draw_frame)
     occlusion_tracker.overdraw_metrics()->RecordMetrics(this);
   else
     DCHECK(!have_copy_request);
 
   RemoveRenderPasses(CullRenderPassesWithNoQuads(), frame);
   if (!output_surface_->ForcedDrawToSoftwareDevice())
     renderer_->DecideRenderPassAllocationsForFrame(frame->render_passes);
-  if (renderer_) {
-    RemoveRenderPasses(CullRenderPassesWithCachedTextures(renderer_.get()),
-                       frame);
-  }
+  RemoveRenderPasses(CullRenderPassesWithCachedTextures(renderer_.get()),
+                     frame);
 
   // If we're making a frame to draw, it better have at least one render pass.
   DCHECK(!frame->render_passes.empty());
   return draw_frame;
 }
 
 void LayerTreeHostImpl::MainThreadHasStoppedFlinging() {
   if (input_handler_client_)
     input_handler_client_->MainThreadHasStoppedFlinging();
 }
@@ skipping 447 matching lines @@
   }
   active_tree_->root_layer()->ResetAllChangeTrackingForSubtree();
 }
 
 void LayerTreeHostImpl::DidDrawAllLayers(const FrameData& frame) {
   for (size_t i = 0; i < frame.will_draw_layers.size(); ++i)
     frame.will_draw_layers[i]->DidDraw(resource_provider_.get());
 
   // Once all layers have been drawn, pending texture uploads should no
   // longer block future uploads.
-  if (resource_provider_)
-    resource_provider_->MarkPendingUploadsAsNonBlocking();
+  resource_provider_->MarkPendingUploadsAsNonBlocking();
 }
 
 void LayerTreeHostImpl::FinishAllRendering() {
   if (renderer_)
     renderer_->Finish();
 }
 
 bool LayerTreeHostImpl::IsContextLost() {
   DCHECK(proxy_->IsImplThread());
   return renderer_ && renderer_->IsContextLost();
@@ skipping 1130 matching lines @@
 }
 
 void LayerTreeHostImpl::SetDebugState(const LayerTreeDebugState& debug_state) {
   if (debug_state_.continuous_painting != debug_state.continuous_painting)
     paint_time_counter_->ClearHistory();
 
   debug_state_ = debug_state;
 }
 
 }  // namespace cc