Android: Handle readback helper context init failure

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 4a193c2d6dc55c5721e124c32c57a2e9a5892147..7bed6a0cf85fc56f9d163f8c1e10424c7d5e315e 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -190,10 +190,14 @@ GLHelperHolder::CreateContext3D() {
           0,  // offscreen
           url, gpu_channel_host.get(), attrs, lose_context_when_out_of_memory,
           limits, nullptr));
-  if (context->InitializeOnCurrentThread())
+  if (context->InitializeOnCurrentThread()) {
     context->pushGroupMarkerEXT(
         base::StringPrintf("CmdBufferImageTransportFactory-%p",
                            context.get()).c_str());
+  } else {
+    context.reset();
+  }
+
   return context.Pass();
 }