Forward along the lost_resource to layer client

Forward the boolean flag indicating if the resource is lost and let
canvas handle how to handle the lost resource, not simply ignore to
call mailboxReleased.

BUG=390960

Review URL: https://codereview.chromium.org/369823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287686 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/compositor_bindings/web_external_texture_layer_impl.cc

@@ -113,7 +113,7 @@ void WebExternalTextureLayerImpl::DidReleaseMailbox(
     WebExternalBitmapImpl* bitmap,
     unsigned sync_point,
     bool lost_resource) {
-  if (lost_resource || !layer) {
+  if (!layer) {
     delete bitmap;
     return;
   }
@@ -123,7 +123,7 @@ void WebExternalTextureLayerImpl::DidReleaseMailbox(
   available_mailbox.syncPoint = sync_point;
   if (bitmap)
     layer->free_bitmaps_.push_back(bitmap);
-  layer->client_->mailboxReleased(available_mailbox);
+  layer->client_->mailboxReleased(available_mailbox, lost_resource);
 }
 
 }  // namespace content