Mandoline: Move ContentHandlerConnection into separate file

mojo/shell/application_manager_unittest.cc

Index: mojo/shell/application_manager_unittest.cc
diff --git a/mojo/shell/application_manager_unittest.cc b/mojo/shell/application_manager_unittest.cc
index bc32a39f0b7f91e175f58c07c691d2189f366178..c5f883e30b08be828051fcb2a1b2b5b6b6c31b0f 100644
--- a/mojo/shell/application_manager_unittest.cc
+++ b/mojo/shell/application_manager_unittest.cc
@@ -773,7 +773,7 @@ TEST_F(ApplicationManagerTest, TestEndApplicationClosure) {
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From("test:test");
   application_manager_->ConnectToApplication(
-      request.Pass(), GURL(), nullptr, nullptr,
+      request.Pass(), std::string(), GURL(), nullptr, nullptr,
       base::Bind(&QuitClosure, base::Unretained(&called)));
   loop_.Run();
   EXPECT_TRUE(called);
@@ -800,7 +800,7 @@ TEST(ApplicationManagerTest2, ContentHandlerConnectionGetsRequestorURL) {
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From("test:test");
   application_manager.ConnectToApplication(
-      request.Pass(), requestor_url, nullptr, nullptr,
+      request.Pass(), std::string(), requestor_url, nullptr, nullptr,
       base::Bind(&QuitClosure, base::Unretained(&called)));
   loop.Run();
   EXPECT_TRUE(called);