cc: Add LayerTreeHost::InitParams for LayerTreeHost creation.

ui/compositor/compositor.cc

 // Copyright (c) 2012 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 "ui/compositor/compositor.h"
 
 #include <algorithm>
 #include <deque>
 
 #include "base/bind.h"
@@ skipping 122 matching lines @@
   settings.use_one_copy = IsUIOneCopyEnabled();
   settings.use_image_texture_target = context_factory_->GetImageTextureTarget();
   // Note: gathering of pixel refs is only needed when using multiple
   // raster threads.
   settings.gather_pixel_refs = false;
 
   settings.use_compositor_animation_timelines =
       command_line->HasSwitch(switches::kUIEnableCompositorAnimationTimelines);
 
   base::TimeTicks before_create = base::TimeTicks::Now();
-  host_ = cc::LayerTreeHost::CreateSingleThreaded(
-      this, this, context_factory_->GetSharedBitmapManager(),
-      context_factory_->GetGpuMemoryBufferManager(),
-      context_factory_->GetTaskGraphRunner(), settings, task_runner_, nullptr);
+
+  cc::LayerTreeHost::InitParams params;
+  params.client = this;
+  params.shared_bitmap_manager = context_factory_->GetSharedBitmapManager();
+  params.gpu_memory_buffer_manager =
+      context_factory_->GetGpuMemoryBufferManager();
+  params.task_graph_runner = context_factory_->GetTaskGraphRunner();
+  params.settings = &settings;
+  params.main_task_runner = task_runner_;
+  host_ = cc::LayerTreeHost::CreateSingleThreaded(this, &params);
   UMA_HISTOGRAM_TIMES("GPU.CreateBrowserCompositor",
                       base::TimeTicks::Now() - before_create);
   host_->SetRootLayer(root_web_layer_);
   host_->set_surface_id_namespace(surface_id_allocator_->id_namespace());
   host_->SetLayerTreeHostClientReady();
 }
 
 Compositor::~Compositor() {
   TRACE_EVENT0("shutdown", "Compositor::destructor");
 
@@ skipping 268 matching lines @@
                     observer_list_,
                     OnCompositingLockStateChanged(this));
 }
 
 void Compositor::CancelCompositorLock() {
   if (compositor_lock_)
     compositor_lock_->CancelLock();
 }
 
 }  // namespace ui