Added preliminary support for tile rasterization with Ganesh

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 <limits>
 
 #include "base/basictypes.h"
@@ skipping 1660 matching lines @@
 
 void LayerTreeHostImpl::CreateAndSetTileManager(
     ResourceProvider* resource_provider,
     ContextProvider* context_provider,
     bool using_map_image) {
   DCHECK(settings_.impl_side_painting);
   DCHECK(resource_provider);
   tile_manager_ =
       TileManager::Create(this,
                           resource_provider,
+                          context_provider,

[nduca, 2013/12/02 19:50:17]

I think you're better off passing in a GpuRasterizer than passing in the context
provider.

[slavi, 2013/12/04 02:06:50]

That was done per enne request to avoid the need of SetClient method. I have no
opinion eitherway. 

Switched it back to the SetClient API so that it's easier to test with
FakeGpuRasterizers and such.

                           settings_.num_raster_threads,
                           rendering_stats_instrumentation_,
                           using_map_image,
                           GetMaxTransferBufferUsageBytes(context_provider),
                           GetMaxRasterTasksUsageBytes(context_provider),
                           GetMapImageTextureTarget(context_provider));
 
   UpdateTileManagerMemoryPolicy(ActualManagedMemoryPolicy());
   need_to_update_visible_tiles_before_draw_ = false;
 }
@@ skipping 1174 matching lines @@
   if (evicted_ui_resources_.empty())
     client_->OnCanDrawStateChanged(CanDraw());
 }
 
 void LayerTreeHostImpl::ScheduleMicroBenchmark(
     scoped_ptr<MicroBenchmarkImpl> benchmark) {
   micro_benchmark_controller_.ScheduleRun(benchmark.Pass());
 }
 
 }  // namespace cc