Add a mojo channel for frame messages.

content/browser/frame_host/interstitial_page_impl.cc

Index: content/browser/frame_host/interstitial_page_impl.cc
diff --git a/content/browser/frame_host/interstitial_page_impl.cc b/content/browser/frame_host/interstitial_page_impl.cc
index 31a488641f1fc3905f7ea22f9a93a26f310fa074..f1db5b255372bd7137ed4d44cf5dbd599359afc1 100644
--- a/content/browser/frame_host/interstitial_page_impl.cc
+++ b/content/browser/frame_host/interstitial_page_impl.cc
@@ -431,8 +431,7 @@ void InterstitialPageImpl::Cut() {
   if (!focused_node)
     return;
 
-  focused_node->current_frame_host()->Send(
-      new InputMsg_Cut(focused_node->current_frame_host()->GetRoutingID()));
+  focused_node->current_frame_host()->GetFrameInputHandler()->Cut();
   RecordAction(base::UserMetricsAction("Cut"));
 }
 
@@ -441,8 +440,7 @@ void InterstitialPageImpl::Copy() {
   if (!focused_node)
     return;
 
-  focused_node->current_frame_host()->Send(
-      new InputMsg_Copy(focused_node->current_frame_host()->GetRoutingID()));
+  focused_node->current_frame_host()->GetFrameInputHandler()->Copy();
   RecordAction(base::UserMetricsAction("Copy"));
 }
 
@@ -451,8 +449,7 @@ void InterstitialPageImpl::Paste() {
   if (!focused_node)
     return;
 
-  focused_node->current_frame_host()->Send(
-      new InputMsg_Paste(focused_node->current_frame_host()->GetRoutingID()));
+  focused_node->current_frame_host()->GetFrameInputHandler()->Paste();
   RecordAction(base::UserMetricsAction("Paste"));
 }
 
@@ -461,8 +458,7 @@ void InterstitialPageImpl::SelectAll() {
   if (!focused_node)
     return;
 
-  focused_node->current_frame_host()->Send(new InputMsg_SelectAll(
-      focused_node->current_frame_host()->GetRoutingID()));
+  focused_node->current_frame_host()->GetFrameInputHandler()->SelectAll();
   RecordAction(base::UserMetricsAction("SelectAll"));
 }