Fix cross-site popups to inherit their opener's sandbox flags even when popup opener is not set.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index a06c7ccf3ca49dc28097d344a1f2d0e2f45de9ef..c298e672bcb755c6b09cc7f85c06ab2a59c50eae 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -808,16 +808,15 @@ void RenderViewImpl::Initialize(const ViewMsg_New_Params& params,
 
   // If we have an opener_frame but we weren't created by a renderer, then it's
   // the browser asking us to set our opener to another frame.
-  if (opener_frame && !was_created_by_renderer) {
+  if (opener_frame && !was_created_by_renderer)
     webview()->mainFrame()->setOpener(opener_frame);
 
-    // Ensure that sandbox flags are inherited from an opener in a different
-    // process.  In that case, the browser process will set any inherited
-    // sandbox flags in |replicated_frame_state|, so apply them here.
-    if (webview()->mainFrame()->isWebLocalFrame()) {
-      webview()->mainFrame()->toWebLocalFrame()->forceSandboxFlags(
-          params.replicated_frame_state.sandbox_flags);
-    }
+  // Ensure that sandbox flags are inherited from an opener in a different
+  // process.  In that case, the browser process will set any inherited
+  // sandbox flags in |replicated_frame_state|, so apply them here.
+  if (!was_created_by_renderer && webview()->mainFrame()->isWebLocalFrame()) {
+    webview()->mainFrame()->toWebLocalFrame()->forceSandboxFlags(
+        params.replicated_frame_state.sandbox_flags);
   }
 
   // If we are initially swapped out, navigate to kSwappedOutURL.