cc: Add tile-free software compositing mode.

cc/trees/thread_proxy.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/thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "cc/base/thread.h"
@@ skipping 894 matching lines @@
 
   // If it is a forced draw, make sure we do a draw and swap.
   gfx::Rect readback_rect;
   if (readback_request_on_impl_thread_)
     readback_rect = readback_request_on_impl_thread_->rect;
 
   LayerTreeHostImpl::FrameData frame;
   bool draw_frame = false;
   bool start_ready_animations = true;
 
+  if (layer_tree_host_impl_->settings().tile_free_software_compositing)
+    frame.cannot_append_tile_draw_quads = true;
+
   if (layer_tree_host_impl_->CanDraw()) {
     // Do not start animations if we skip drawing the frame to avoid
     // checkerboarding.
     if (layer_tree_host_impl_->PrepareToDraw(&frame, readback_rect) ||
         forced_draw)
       draw_frame = true;
     else
       start_ready_animations = false;
   }
 
@@ skipping 427 matching lines @@
 
 void ThreadProxy::DidReceiveLastInputEventForVSync(
     base::TimeTicks frame_time) {
   if (render_vsync_notification_enabled_) {
     TRACE_EVENT0("cc", "ThreadProxy::DidReceiveLastInputEventForVSync");
     DidVSync(frame_time);
   }
 }
 
 }  // namespace cc