Remove CreateRenderFrameFlags enum.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 9c447275d21f22286612fab8e7f5dd74ad85f37f..33cb8178924d7731f95adc93ce7db5e59018c6fb 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -88,12 +88,6 @@ struct GlobalRequestID;
 struct Referrer;
 struct ResourceResponse;
 
-// Flag arguments for RenderFrameHost creation.
-enum CreateRenderFrameFlags {
-  // The RenderFrame is initially hidden.
-  CREATE_RF_HIDDEN = 1 << 0,
-};
-
 class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
                                            public BrowserAccessibilityDelegate,
                                            public SiteInstanceImpl::Observer {
@@ -569,7 +563,7 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
                       FrameTreeNode* frame_tree_node,
                       int32_t routing_id,
                       int32_t widget_routing_id,
-                      int flags);
+                      bool hidden);
 
  private:
   friend class TestRenderFrameHost;