Mojo Spy core first cut

mojo/service_manager/service_manager.h

Index: mojo/service_manager/service_manager.h
diff --git a/mojo/service_manager/service_manager.h b/mojo/service_manager/service_manager.h
index f2ee988960fec903c0be4634222373d19b49c3cb..d94caeaa746ad0a9fdd858613a89c2b45115be29 100644
--- a/mojo/service_manager/service_manager.h
+++ b/mojo/service_manager/service_manager.h
@@ -22,6 +22,15 @@ namespace mojo {
 
 class ServiceLoader;
 
+// Interface class for testing/debugging only.

[DaveMoore, 2014/04/04 21:06:46]

This should either be a nested class within ServiceManager
(ServiceManager::Interceptor) or defined in a separate file. I prefer the
former.

[cpu_(ooo_6.6-7.5), 2014/04/04 23:42:45]

Done.

+class ServiceInterceptor {
+ public:
+  virtual ~ServiceInterceptor() {}
+  // Called when ServiceManager::Connect is called.
+  virtual ScopedMessagePipeHandle OnConnectToClient(
+      const GURL& url, ScopedMessagePipeHandle handle) = 0;
+};
+
 class MOJO_SERVICE_MANAGER_EXPORT ServiceManager {
  public:
   // API for testing.
@@ -58,6 +67,8 @@ class MOJO_SERVICE_MANAGER_EXPORT ServiceManager {
   // Sets a Loader to be used for a specific url scheme.
   // Does not take ownership of |loader|.
   void SetLoaderForScheme(ServiceLoader* loader, const std::string& scheme);
+  // Allows to interpose a debugger to service connections.
+  void SetInterceptor(ServiceInterceptor* interceptor);
 
  private:
   class ServiceFactory;
@@ -77,6 +88,7 @@ class MOJO_SERVICE_MANAGER_EXPORT ServiceManager {
   URLToLoaderMap url_to_loader_;
   SchemeToLoaderMap scheme_to_loader_;
   ServiceLoader* default_loader_;
+  ServiceInterceptor* interceptor_;
 
   URLToServiceFactoryMap url_to_service_factory_;
   DISALLOW_COPY_AND_ASSIGN(ServiceManager);