Adds a way to determine id of content handler that created app

mojo/runner/context.cc

Index: mojo/runner/context.cc
diff --git a/mojo/runner/context.cc b/mojo/runner/context.cc
index 7b5be566d865af49aaf78995cc01c510af10e5a8..265be1a6e4cb1c1e767ed40b5754a2a1afd22ead 100644
--- a/mojo/runner/context.cc
+++ b/mojo/runner/context.cc
@@ -195,8 +195,10 @@ void InitDevToolsServiceIfNeeded(shell::ApplicationManager* manager,
   request->url = "mojo:devtools_service";
   manager->ConnectToApplication(
       nullptr, request.Pass(), std::string(), GURL("mojo:shell"),
+      shell::ApplicationManager::kInvalidContentHandlerID,
       GetProxy(&devtools_service_provider), nullptr,
-      shell::GetPermissiveCapabilityFilter(), base::Closure());
+      shell::GetPermissiveCapabilityFilter(), base::Closure(),
+      shell::EmptyConnectCallback());
 
   devtools_service::DevToolsCoordinatorPtr devtools_coordinator;
   devtools_service_provider->ConnectToService(
@@ -313,8 +315,10 @@ bool Context::Init() {
   request->url = mojo::String::From("mojo:tracing");
   application_manager_.ConnectToApplication(
       nullptr, request.Pass(), std::string(), GURL(),
+      shell::ApplicationManager::kInvalidContentHandlerID,
       GetProxy(&service_provider_ptr), tracing_service_provider_ptr.Pass(),
-      shell::GetPermissiveCapabilityFilter(), base::Closure());
+      shell::GetPermissiveCapabilityFilter(), base::Closure(),
+      shell::EmptyConnectCallback());
 
   // Record the shell startup metrics used for performance testing.
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
@@ -379,9 +383,11 @@ void Context::Run(const GURL& url) {
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From(url.spec());
   application_manager_.ConnectToApplication(
-      nullptr, request.Pass(), std::string(), GURL(), GetProxy(&services),
+      nullptr, request.Pass(), std::string(), GURL(),
+      shell::ApplicationManager::kInvalidContentHandlerID, GetProxy(&services),
       exposed_services.Pass(), shell::GetPermissiveCapabilityFilter(),
-      base::Bind(&Context::OnApplicationEnd, base::Unretained(this), url));
+      base::Bind(&Context::OnApplicationEnd, base::Unretained(this), url),
+      shell::EmptyConnectCallback());
 }
 
 void Context::RunCommandLineApplication(const base::Closure& callback) {