Pass a sequence number along with the DIB handle when compositing in software.

cc/output/software_renderer.cc

 // Copyright 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 "cc/output/software_renderer.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/base/math_util.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
@@ skipping 106 matching lines @@
 bool SoftwareRenderer::SwapBuffers() {
   if (Settings().compositor_frame_message)
     output_surface_->SendFrameToParentCompositor(&compositor_frame_);
   return true;
 }
 
 void SoftwareRenderer::ReceiveCompositorFrameAck(
     const CompositorFrameAck& ack) {
   if (capabilities_.using_swap_complete_callback)
     client_->OnSwapBuffersComplete();
-  output_device_->ReclaimDIB(ack.last_content_dib);
+  output_device_->ReclaimDIB(ack.last_dib_id);
 }
 
 bool SoftwareRenderer::FlippedFramebuffer() const {
   return false;
 }
 
 void SoftwareRenderer::EnsureScissorTestEnabled() {
   is_scissor_enabled_ = true;
   SetClipRect(scissor_rect_);
 }
@@ skipping 277 matching lines @@
                              4 * rect.width());
 }
 
 void SoftwareRenderer::SetVisible(bool visible) {
   if (visible_ == visible)
     return;
   visible_ = visible;
 }
 
 }  // namespace cc