Enable content embedders to specify mojo application task runner.

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 25f0eae5ec57c79bf5bb9a4aaa08c1fb2eba2acf..dc738a45abbd2c6ecbe18ae3a25ae25ffa6acfb0 100644
--- a/content/browser/mojo/mojo_shell_context.h
+++ b/content/browser/mojo/mojo_shell_context.h
@@ -30,11 +30,6 @@ namespace content {
 // app registration and interconnection.
 class CONTENT_EXPORT MojoShellContext {
  public:
-  using StaticApplicationMap =
-      std::map<std::string,
-               base::Callback<std::unique_ptr<shell::ShellClient>(
-                   const base::Closure& quit_closure)>>;
-
   MojoShellContext();
   ~MojoShellContext();
 
@@ -50,8 +45,6 @@ class CONTENT_EXPORT MojoShellContext {
       shell::mojom::InterfaceProviderPtr exposed_services,
       const shell::mojom::Connector::ConnectCallback& callback);
 
-  static void SetApplicationsForTest(const StaticApplicationMap* apps);
-
  private:
   class BuiltinManifestProvider;
   class Proxy;