RenderWidget: make routing_id be a parameter of the ctor

content/renderer/mus/compositor_mus_connection_unittest.cc

Index: content/renderer/mus/compositor_mus_connection_unittest.cc
diff --git a/content/renderer/mus/compositor_mus_connection_unittest.cc b/content/renderer/mus/compositor_mus_connection_unittest.cc
index df3f1e4f40e7af3562bc2ceb65be0e4965159eff..29a50ffe927033de468504bae8ca950fb32424c0 100644
--- a/content/renderer/mus/compositor_mus_connection_unittest.cc
+++ b/content/renderer/mus/compositor_mus_connection_unittest.cc
@@ -151,7 +151,8 @@ class TestInputHandlerManagerClient : public InputHandlerManagerClient {
 class TestRenderWidget : public RenderWidget {
  public:
   explicit TestRenderWidget(CompositorDependencies* compositor_deps)
-      : RenderWidget(compositor_deps,
+      : RenderWidget(1,
+                     compositor_deps,
                      blink::WebPopupTypeNone,
                      ScreenInfo(),
                      true,