Rename shell namespace to service_manager

Presubmit skipped to avoid errors being triggered by things which
aren't actually changing here.

Strictly a rename CL.

BUG=None
[email protected]
NOPRESUBMIT=True
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2420253002
Cr-Commit-Position: refs/heads/master@{#425570}
diff --git a/ash/mus/keyboard_ui_mus.cc b/ash/mus/keyboard_ui_mus.cc
index e066b13..ade175f 100644
--- a/ash/mus/keyboard_ui_mus.cc
+++ b/ash/mus/keyboard_ui_mus.cc
@@ -10,7 +10,7 @@
 
 namespace ash {
 
-KeyboardUIMus::KeyboardUIMus(::shell::Connector* connector)
+KeyboardUIMus::KeyboardUIMus(service_manager::Connector* connector)
     : is_enabled_(false), observer_binding_(this) {
   if (connector) {
     // TODO(sky): should be something like mojo:keyboard, but need mapping.
@@ -23,7 +23,7 @@
 
 // static
 std::unique_ptr<KeyboardUI> KeyboardUIMus::Create(
-    ::shell::Connector* connector) {
+    service_manager::Connector* connector) {
   return base::MakeUnique<KeyboardUIMus>(connector);
 }