Teach mojo_shell how to load http URLs

mojo/shell/shell.cc

Index: mojo/shell/shell.cc
diff --git a/mojo/shell/shell.cc b/mojo/shell/shell.cc
index 72f697f232c2910b6e76cb49401c824ca8dea65b..74d6a13fa5ead25cf89e77106a95cc1198c55af9 100644
--- a/mojo/shell/shell.cc
+++ b/mojo/shell/shell.cc
@@ -8,7 +8,9 @@
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/shell/app_container.h"
+#include "mojo/shell/storage.h"
 #include "mojo/shell/switches.h"
+#include "mojo/shell/task_runners.h"
 #include "mojo/system/core_impl.h"
 
 int main(int argc, char** argv) {
@@ -19,6 +21,10 @@ int main(int argc, char** argv) {
 
   base::MessageLoop message_loop(base::MessageLoop::TYPE_UI);
 
+  // TODO(abarth): Group these objects into a "context" object.
+  mojo::shell::TaskRunners task_runners(message_loop.message_loop_proxy());
+  mojo::shell::Storage storage;
+
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (!command_line.HasSwitch(switches::kApp)) {
     LOG(ERROR) << "No app path specified.";