Preliminary compositor disabling patch.

cc/output/gl_renderer.cc

 // Copyright 2010 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/output/gl_renderer.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <string>
@@ skipping 2394 matching lines @@
     DCHECK(current_sync_query_);
     current_sync_query_->End();
     pending_sync_queries_.push_back(current_sync_query_.Pass());
   }
 
   current_framebuffer_lock_ = nullptr;
   swap_buffer_rect_.Union(gfx::ToEnclosingRect(frame->root_damage_rect));
 
   GLC(gl_, gl_->Disable(GL_BLEND));
   blend_shadow_ = false;
-
-  ScheduleOverlays(frame);
 }
 
 void GLRenderer::FinishDrawingQuadList() {
   FlushTextureQuadCache(SHARED_BINDING);
 }
 
 bool GLRenderer::FlippedFramebuffer(const DrawingFrame* frame) const {
   if (frame->current_render_pass != frame->root_render_pass)
     return true;
   return FlippedRootFramebuffer();
@@ skipping 1095 matching lines @@
     context_support_->ScheduleOverlayPlane(
         overlay.plane_z_order,
         overlay.transform,
         pending_overlay_resources_.back()->texture_id(),
         overlay.display_rect,
         overlay.uv_rect);
   }
 }
 
 }  // namespace cc