First cut at "content handling" support in Mojo.

mojo/shell/dynamic_service_loader.h

Index: mojo/shell/dynamic_service_loader.h
diff --git a/mojo/shell/dynamic_service_loader.h b/mojo/shell/dynamic_service_loader.h
index 72bf093e56e093809a83cd8d3a934f904cf12bca..0db228471276195d54b80f0913c4eddf32d4c27a 100644
--- a/mojo/shell/dynamic_service_loader.h
+++ b/mojo/shell/dynamic_service_loader.h
@@ -8,6 +8,7 @@
 #include <map>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/service_manager/service_loader.h"
 #include "mojo/services/public/interfaces/network/network_service.mojom.h"
@@ -30,17 +31,36 @@ class DynamicServiceLoader : public ServiceLoader {
                        scoped_ptr<DynamicServiceRunnerFactory> runner_factory);
   virtual ~DynamicServiceLoader();
 
+  void RegisterContentHandler(const std::string& mime_type,
+                              const GURL& content_handler_url);
+
   // ServiceLoader methods:
-  virtual void LoadService(ServiceManager* manager,
-                           const GURL& url,
-                           ScopedMessagePipeHandle service_handle) OVERRIDE;
+  virtual void Load(ServiceManager* manager,
+                    const GURL& url,
+                    scoped_refptr<LoadCallbacks> callbacks) OVERRIDE;
   virtual void OnServiceError(ServiceManager* manager, const GURL& url)
       OVERRIDE;
 
  private:
+  typedef std::map<std::string, GURL> MimeTypeToURLMap;
+
+  void LoadLocalService(const GURL& resolved_url,
+                        scoped_refptr<LoadCallbacks> callbacks);
+  void LoadNetworkService(const GURL& resolved_url,
+                          scoped_refptr<LoadCallbacks> callbacks);
+  void OnLoadNetworkServiceComplete(scoped_refptr<LoadCallbacks> callbacks,
+                                    URLResponsePtr url_response);
+  void RunLibrary(const base::FilePath& response_file,
+                  scoped_refptr<LoadCallbacks> callbacks,
+                  bool delete_file_after,
+                  bool response_path_exists);
+
   Context* const context_;
   scoped_ptr<DynamicServiceRunnerFactory> runner_factory_;
   NetworkServicePtr network_service_;
+  URLLoaderPtr url_loader_;
+  MimeTypeToURLMap mime_type_to_url_;
+  base::WeakPtrFactory<DynamicServiceLoader> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DynamicServiceLoader);
 };