mus: Initialize WindowManagerConnection in chrome instead of in content.

services/navigation/content_client/browser_main_parts.cc

Index: services/navigation/content_client/browser_main_parts.cc
diff --git a/services/navigation/content_client/browser_main_parts.cc b/services/navigation/content_client/browser_main_parts.cc
index 09a688b3c999058a00bfea49d2c5f9e1e34ea4bb..857d7e9579b1c0f76f352b0e1989376f32eea2aa 100644
--- a/services/navigation/content_client/browser_main_parts.cc
+++ b/services/navigation/content_client/browser_main_parts.cc
@@ -9,6 +9,7 @@
 #include "content/shell/browser/shell_browser_context.h"
 #include "content/shell/browser/shell_net_log.h"
 #include "services/navigation/navigation.h"
+#include "ui/views/mus/window_manager_connection.h"
 #include "ui/views/test/test_views_delegate.h"
 
 namespace navigation {
@@ -23,11 +24,17 @@ void BrowserMainParts::ToolkitInitialized() {
 }
 
 void BrowserMainParts::PreMainMessageLoopRun() {
+  content::MojoShellConnection* mojo_shell_connection =
+      content::MojoShellConnection::Get();
+  if (mojo_shell_connection) {
+    views::WindowManagerConnection::Create(
+        mojo_shell_connection->GetConnector(),
+        mojo_shell_connection->GetIdentity());
+  }
   net_log_.reset(new content::ShellNetLog("ash_shell"));
   browser_context_.reset(
       new content::ShellBrowserContext(false, net_log_.get()));
-  navigation_->Init(content::MojoShellConnection::Get()->GetConnector(),
-                    browser_context());
+  navigation_->Init(mojo_shell_connection->GetConnector(), browser_context());
 }
 
 void BrowserMainParts::PostMainMessageLoopRun() {