Enable content embedders to specify mojo application task runner.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 1246431278cd7ced8fa2359f071f3d87c374a4eb..a00041a46e26985515246c927dfbd4e07b086f48 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -2800,8 +2800,9 @@ void ChromeContentBrowserClient::RegisterRenderFrameMojoServices(
 void ChromeContentBrowserClient::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
 }