Upstream rewrite of Instant.

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 6d5453aa662cdf1de7d2aa4fec73f9603ce147bf..79db04a037571abe95a5e13e2db760dae6c04359 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -921,7 +921,8 @@ void WebContentsImpl::WasRestored() {
 #if defined(OS_MACOSX)
     rwhv->SetActive(true);
 #endif
-  }
+  } else
+    LOG(WARNING) << "Restoring web contents with no rwhv";
 
   last_selected_time_ = base::TimeTicks::Now();
 
@@ -931,9 +932,8 @@ void WebContentsImpl::WasRestored() {
   // one to make sure it's up to date.
   RenderViewHostImpl* rvh =
       static_cast<RenderViewHostImpl*>(GetRenderViewHost());
-  if (rvh) {
+  if (rvh)
     rvh->ResizeRectChanged(GetRootWindowResizerRect());
-  }
 
   bool is_visible = true;
   content::NotificationService::current()->Notify(