Enable content embedders to specify mojo application task runner.

content/shell/browser/shell_content_browser_client.cc

Index: content/shell/browser/shell_content_browser_client.cc
diff --git a/content/shell/browser/shell_content_browser_client.cc b/content/shell/browser/shell_content_browser_client.cc
index f7219394dbdefcf16f270689a9435f2e49148f42..2057cdc842c136230b48f13cfbc95a2125c2b68c 100644
--- a/content/shell/browser/shell_content_browser_client.cc
+++ b/content/shell/browser/shell_content_browser_client.cc
@@ -180,8 +180,9 @@ bool ShellContentBrowserClient::IsHandledURL(const GURL& url) {
 void ShellContentBrowserClient::RegisterInProcessMojoApplications(
     StaticMojoApplicationMap* apps) {
 #if (ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS)
-  apps->insert(std::make_pair("mojo:media",
-                              base::Bind(&media::CreateMojoMediaApplication)));
+  content::MojoApplicationInfo app_info;
+  app_info.application_factory = base::Bind(&media::CreateMojoMediaApplication);
+  apps->insert(std::make_pair("mojo:media", app_info));
 #endif
 }