Convert UtilityProcessHost to bootstrap Mojo Channel using the Shell connection

content/browser/mojo/mojo_shell_context.h

Index: content/browser/mojo/mojo_shell_context.h
diff --git a/content/browser/mojo/mojo_shell_context.h b/content/browser/mojo/mojo_shell_context.h
index 6ef9f895680f59c98b034ebcf475d5799b019313..00f50408719766b39505cb68d0a7c74ee4393c22 100644
--- a/content/browser/mojo/mojo_shell_context.h
+++ b/content/browser/mojo/mojo_shell_context.h
@@ -13,6 +13,7 @@
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/shell_context.h"
 #include "services/shell/public/interfaces/connector.mojom.h"
 #include "services/shell/shell.h"
 
@@ -28,10 +29,10 @@ namespace content {
 
 // MojoShellContext hosts the browser's ApplicationManager, coordinating
 // app registration and interconnection.
-class CONTENT_EXPORT MojoShellContext {
+class CONTENT_EXPORT MojoShellContext : public ShellContext {

[Ken Rockot(use gerrit already), 2016/06/30 14:50:53]

nit: I suppose ShellContextImpl is a much better name for this naow. But I'd
consider it a TODO rather than a blocker.

  public:
   MojoShellContext();
-  ~MojoShellContext();
+  ~MojoShellContext() override;
 
   // Connects an application at |name| and gets a handle to its exposed
   // services. This is only intended for use in browser code that's not part of
@@ -45,9 +46,6 @@ class CONTENT_EXPORT MojoShellContext {
       shell::mojom::InterfaceProviderPtr exposed_services,
       const shell::mojom::Connector::ConnectCallback& callback);
 
-  // Returns a shell::Connector that can be used on the IO thread.
-  static shell::Connector* GetConnectorForIOThread();
-
  private:
   class BuiltinManifestProvider;
   class Proxy;