Support error handling for Surface readbacks

athena/content/content_proxy.cc

Index: athena/content/content_proxy.cc
diff --git a/athena/content/content_proxy.cc b/athena/content/content_proxy.cc
index 2c962e7c72c3d46fe8f4592cba5928a50b979140..72c8a8d957c1e097948aee54ddc0d65ccaa528c5 100644
--- a/athena/content/content_proxy.cc
+++ b/athena/content/content_proxy.cc
@@ -157,12 +157,15 @@ void ContentProxy::CreateProxyContent() {
       kAlpha_8_SkColorType);
 }
 
-void ContentProxy::OnContentImageRead(bool success, const SkBitmap& bitmap) {
+void ContentProxy::OnContentImageRead(
+    const SkBitmap& bitmap,
+    const content::ReadbackResponse& response) {
   // Now we can hide the content. Note that after hiding we are freeing memory
   // and if something goes wrong we will end up with an empty page.
   HideOriginalContent();
 
-  if (!success || bitmap.empty() || bitmap.isNull())
+  if ((response != content::READBACK_SUCCESS) || bitmap.empty() ||
+      bitmap.isNull())
     return;
 
   // While we are encoding the image, we keep the current image as reference