android webview: allow cc to fail hardware draw

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 <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 348 matching lines @@
     // to the main thread for the last frame that we've processed. If that is
     // set, that means the current frame is one past the frame in which we've
     // finished the processing.
     impl().layer_tree_host_impl->RecordMainFrameTiming(
         impl().last_processed_begin_main_frame_args,
         impl().layer_tree_host_impl->CurrentBeginFrameArgs());
     impl().last_processed_begin_main_frame_args = BeginFrameArgs();
   }
 }
 
+void ThreadProxy::OnResourcelessSoftareDrawStateChanged(
+    bool resourceless_draw) {
+  DCHECK(IsImplThread());
+  impl().scheduler->SetResourcelessSoftareDraw(resourceless_draw);
+}
+
 void ThreadProxy::OnCanDrawStateChanged(bool can_draw) {
   TRACE_EVENT1(
       "cc", "ThreadProxy::OnCanDrawStateChanged", "can_draw", can_draw);
   DCHECK(IsImplThread());
   impl().scheduler->SetCanDraw(can_draw);
 }
 
 void ThreadProxy::NotifyReadyToActivate() {
   TRACE_EVENT0("cc", "ThreadProxy::NotifyReadyToActivate");
   impl().scheduler->NotifyReadyToActivate();
@@ skipping 885 matching lines @@
 
 base::WeakPtr<ProxyMain> ThreadProxy::GetMainWeakPtr() {
   return main_thread_weak_ptr_;
 }
 
 base::WeakPtr<ProxyImpl> ThreadProxy::GetImplWeakPtr() {
   return impl_thread_weak_ptr_;
 }
 
 }  // namespace cc