Fix webrequest api for webview in webui

extensions/browser/guest_view/guest_view_base.cc

Index: extensions/browser/guest_view/guest_view_base.cc
diff --git a/extensions/browser/guest_view/guest_view_base.cc b/extensions/browser/guest_view/guest_view_base.cc
index 2fbbf603020c336a136e2271ac121090f84d6d1e..0ec0d61878d1d404f88dceea9346cb4d8c1f8bbb 100644
--- a/extensions/browser/guest_view/guest_view_base.cc
+++ b/extensions/browser/guest_view/guest_view_base.cc
@@ -75,6 +75,10 @@ class GuestViewBase::EmbedderLifetimeObserver : public WebContentsObserver {
 
   void AboutToNavigateRenderView(
       content::RenderViewHost* render_view_host) override {
+    if (destroyed_)
+      return;
+
+    guest_->WillDetachFromEmbedder();

[Fady Samuel, 2014/10/22 16:43:20]

I think guest_->EmbedderDestroyed() already does what you need. It's already
called inside Destroy().

[guohui, 2014/10/22 18:46:06]

EmbedderDestroyed() is executed after embedder_web_contents_ is cleared, which
is needed to remove zoom observer.

     // If the embedder navigates then destroy the guest.
     Destroy();
   }