WIP: Plumbing input event latency reporting through Mus GPU.

content/browser/renderer_host/DEPS

 include_rules = [
   "+cc/switches.h", # For cc command line switches.
   "+components/display_compositor",
   "+components/variations",
   "+services/ui/public",
   "+third_party/zlib",
+  "+ui/latency",
 
   # The renderer_host files should only call upwards in the layering via the
   # delegate interfaces.
   "-content/browser/frame_host",
   "-content/browser/web_contents",
   "-content/public/browser/web_contents.h",
   "-content/public/browser/web_contents_delegate.h",
   "-content/public/browser/web_contents_view.h",
 ]
 
@@ skipping 35 matching lines @@
   # to content/renderer_host, at which time this can be removed.
   # RenderWidgetHostViewGuest dependency is needed to allow for routing mouse
   # events to the correct owner RenderWidgetHostViewBase. It should be removed
   # when all inner WebContents are based on OOPIF structure (as opposed to
   # BrowserPlugin).
   "render_widget_host_input_event_router.cc": [
     "+content/browser/frame_host/render_widget_host_view_child_frame.h",
     "+content/browser/frame_host/render_widget_host_view_guest.h",
   ],
 }