Make input event forwarding work in --site-per-process.

Source/core/html/HTMLFrameElementBase.cpp

Index: Source/core/html/HTMLFrameElementBase.cpp
diff --git a/Source/core/html/HTMLFrameElementBase.cpp b/Source/core/html/HTMLFrameElementBase.cpp
index c53d22a50dfac1f582225371751363a848cf6299..7ac1c12eb20cb446865a47423627d94028506495 100644
--- a/Source/core/html/HTMLFrameElementBase.cpp
+++ b/Source/core/html/HTMLFrameElementBase.cpp
@@ -31,6 +31,7 @@
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/RemoteFrame.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/loader/FrameLoader.h"
 #include "core/page/ChromeClient.h"
@@ -211,8 +212,8 @@ bool HTMLFrameElementBase::isHTMLContentAttribute(const Attribute& attribute) co
 // process. See http://crbug.com/339659.
 void HTMLFrameElementBase::defaultEventHandler(Event* event)
 {
-    if (contentFrame() && contentFrame()->isRemoteFrameTemporary()) {
-        contentFrame()->chromeClient().forwardInputEvent(contentFrame(), event);
+    if (contentFrame() && contentFrame()->isRemoteFrame()) {
+        contentFrame()->chromeClient().forwardInputEvent(toRemoteFrame(contentFrame()), event);
         return;
     }
     HTMLFrameOwnerElement::defaultEventHandler(event);