Set FocusedFrame on RFH's associated WebContents in FindRequestManager

Currently we call on the RFH's associated WebContents' focused
WebContents instead.

Bug: 819919,876890
Change-Id: Ia97f60cb524322fe3f2566ffa8f6ba86eeddcf90
Reviewed-on: https://chromium-review.googlesource.com/1192665
Commit-Queue: Rakina Zata Amni <rakina@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586742}

content/browser/find_request_manager.cc

@@ -348,8 +348,8 @@ void FindRequestManager::SetActiveMatchOrdinal(RenderFrameHostImpl* rfh,
     // match is in, which should be in the |rfh|'s associated WebContents.
     WebContentsImpl* web_contents =
         static_cast<WebContentsImpl*>(WebContents::FromRenderFrameHost(rfh));
-    web_contents->GetFocusedWebContents()->SetFocusedFrame(
-        rfh->frame_tree_node(), rfh->GetSiteInstance());
+    web_contents->SetFocusedFrame(rfh->frame_tree_node(),
+                                  rfh->GetSiteInstance());
   }
   if (rfh == active_frame_) {
     active_match_ordinal_ +=