Fix copying from interstitial pages on OSX.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index a1f733458b9693baf9d3397305e7ac51ec7ccb6b..83e4c5aff4afd6b8d12c57eeaab22f36c71c78a1 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -626,6 +626,11 @@ RenderFrameHost* WebContentsImpl::GetMainFrame() {
 }
 
 RenderFrameHost* WebContentsImpl::GetFocusedFrame() {
+  if (ShowingInterstitialPage()) {
+    InterstitialPageImpl* interstitial_page =
+        (InterstitialPageImpl*)GetInterstitialPage();

[palmer, 2015/04/20 23:51:58]

Use a C++-style cast here.

I don't know exactly what nasko wanted as a test, but it might be good to use
|TestInterstitialPage| in
content/browser/web_contents/web_contents_impl_unittest.cc in a test/test suite.

+    return interstitial_page->GetFrameTree()->root()->current_frame_host();
+  }
   if (!frame_tree_.GetFocusedFrame())
     return NULL;
   return frame_tree_.GetFocusedFrame()->current_frame_host();