Generate MouseEnter/MouseLeave events between processes.

content/browser/renderer_host/DEPS

Index: content/browser/renderer_host/DEPS
diff --git a/content/browser/renderer_host/DEPS b/content/browser/renderer_host/DEPS
index 49841f3f92fd692bdb2e797e9d0126168129c807..3c872db07d008fbb6198f580eb273b9da554f5fd 100644
--- a/content/browser/renderer_host/DEPS
+++ b/content/browser/renderer_host/DEPS
@@ -40,4 +40,9 @@ specific_include_rules = {
   "render_widget_host_view_aura\.cc": [
     "+content/browser/frame_host",
   ],
+  # TODO(kenrb): RenderWidgetHostViewChildFrame should eventually be moved
+  # to content/renderer_host, at which time this can be removed.
+  "render_widget_host_input_event_router.cc": [
+    "+content/browser/frame_host/render_widget_host_view_child_frame.h",
+  ],
 }