clear compositor_host_pending_renderer_state when IPC failed

content/browser/android/synchronous_compositor_browser_filter.cc

 // Copyright 2016 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 "content/browser/android/synchronous_compositor_browser_filter.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 176 matching lines @@
   routing_ids.reserve(compositor_host_pending_renderer_state_.size());
   for (const auto host : compositor_host_pending_renderer_state_)
     routing_ids.push_back(host->routing_id());
 
   std::vector<SyncCompositorCommonRendererParams> params;
   params.reserve(compositor_host_pending_renderer_state_.size());
 
   if (!render_process_host_->Send(
           new SyncCompositorMsg_SynchronizeRendererState(routing_ids,
                                                          &params))) {
+    compositor_host_pending_renderer_state_.clear();
     return;
   }
 
   if (compositor_host_pending_renderer_state_.size() != params.size()) {
     bad_message::ReceivedBadMessage(render_process_host_,
                                     bad_message::SCO_INVALID_ARGUMENT);
+    compositor_host_pending_renderer_state_.clear();
     return;
   }
 
   for (size_t i = 0; i < compositor_host_pending_renderer_state_.size(); ++i) {
     compositor_host_pending_renderer_state_[i]->ProcessCommonParams(params[i]);
   }
   compositor_host_pending_renderer_state_.clear();
 }
 
 }  // namespace content