OnDrawHardware() implementation with async messages

android_webview/browser/hardware_renderer.cc

Index: android_webview/browser/hardware_renderer.cc
diff --git a/android_webview/browser/hardware_renderer.cc b/android_webview/browser/hardware_renderer.cc
index 4a1f37cbe6c17cfb3f85169d344a4d73be11bb0f..31c1941168671ad7d416802c60a02947d2c77420 100644
--- a/android_webview/browser/hardware_renderer.cc
+++ b/android_webview/browser/hardware_renderer.cc
@@ -180,6 +180,10 @@ void HardwareRenderer::SetBackingFrameBufferObject(
 void HardwareRenderer::ReturnResourcesInChildFrame() {
   if (child_frame_.get() && child_frame_->frame.get()) {
     cc::ReturnedResourceArray resources_to_return;
+    DCHECK(child_frame_);
+    DCHECK(child_frame_->frame);
+    DCHECK(child_frame_->frame->delegated_frame_data);

[boliu, 2016/07/29 00:48:21]

crash looks like this DCHECK is failing

the two DCHECKs above are redundant because of the if statement

[ojars, 2016/08/02 21:18:49]

Done.

+    //    DCHECK(child_frame_->frame->delegated_frame_data->resource_list);
     cc::TransferableResource::ReturnResources(
         child_frame_->frame->delegated_frame_data->resource_list,
         &resources_to_return);