aw: Block child compositor if frame is not consumed by parent

android_webview/browser/shared_renderer_state.cc

 // Copyright 2014 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 "android_webview/browser/shared_renderer_state.h"
 
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
@@ skipping 116 matching lines @@
     g_request_draw_gl_tracker.Get().ResetPending();
     LOG(ERROR) << "Failed to request GL process. Deadlock likely";
   }
 }
 
 void SharedRendererState::UpdateParentDrawConstraintsOnUIThread() {
   DCHECK(ui_loop_->BelongsToCurrentThread());
   client_on_ui_->UpdateParentDrawConstraints();
 }
 
+bool SharedRendererState::HasDrawGLInput() const {
+  base::AutoLock lock(lock_);
+  return draw_gl_input_.get();
+}
+
 void SharedRendererState::SetDrawGLInput(scoped_ptr<DrawGLInput> input) {
   base::AutoLock lock(lock_);
   DCHECK(!draw_gl_input_.get());
   draw_gl_input_ = input.Pass();
 }
 
 scoped_ptr<DrawGLInput> SharedRendererState::PassDrawGLInput() {
   base::AutoLock lock(lock_);
   return draw_gl_input_.Pass();
 }
@@ skipping 55 matching lines @@
     : shared_renderer_state_(shared_renderer_state) {
   DCHECK(!shared_renderer_state_->IsInsideHardwareRelease());
   shared_renderer_state_->SetInsideHardwareRelease(true);
 }
 
 InsideHardwareReleaseReset::~InsideHardwareReleaseReset() {
   shared_renderer_state_->SetInsideHardwareRelease(false);
 }
 
 }  // namespace android_webview