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

mojo/shell/application_instance.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SHELL_APPLICATION_INSTANCE_H_
 #define MOJO_SHELL_APPLICATION_INSTANCE_H_
 
 #include <set>
 
 #include "base/callback.h"
 #include "mojo/application/public/interfaces/application.mojom.h"
 #include "mojo/application/public/interfaces/shell.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/shell/capability_filter.h"
 #include "mojo/shell/identity.h"
 #include "url/gurl.h"
 
 namespace mojo {
 namespace shell {
 
 class ApplicationManager;
 
 // Encapsulates a connection to an instance of an application, tracked by the
 // shell's ApplicationManager.
 class ApplicationInstance : public Shell {
  public:
+  // |requesting_content_handler_id| is the id of the content handler that
+  // loaded this app. If the app was not loaded by a content handler the id
+  // is kInvalidContentHandlerID.
   ApplicationInstance(ApplicationPtr application,
                       ApplicationManager* manager,
                       const Identity& originator_identity,
                       const Identity& resolved_identity,
                       const CapabilityFilter& filter,
+                      uint32_t requesting_content_handler_id,
                       const base::Closure& on_application_end);
 
   ~ApplicationInstance() override;
 
   void InitializeApplication();
 
   void ConnectToClient(ApplicationInstance* originator,
                        const GURL& requested_url,
                        const GURL& requestor_url,
                        InterfaceRequest<ServiceProvider> services,
                        ServiceProviderPtr exposed_services,
-                       const CapabilityFilter& filter);
+                       const CapabilityFilter& filter,
+                       const ConnectToApplicationCallback& callback);
 
   // Returns the set of interfaces this application instance is allowed to see
   // from an instance with |identity|.
   AllowedInterfaces GetAllowedInterfaces(const Identity& identity) const;
 
   Application* application() { return application_.get(); }
   const Identity& identity() const { return identity_; }
   base::Closure on_application_end() const { return on_application_end_; }
+  void set_requesting_content_handler_id(uint32_t id) {
+    requesting_content_handler_id_ = id;
+  }
+  uint32_t requesting_content_handler_id() const {
+    return requesting_content_handler_id_;
+  }
 
  private:
   // Shell implementation:
-  void ConnectToApplication(URLRequestPtr app_request,
-                            InterfaceRequest<ServiceProvider> services,
-                            ServiceProviderPtr exposed_services,
-                            CapabilityFilterPtr filter) override;
+  void ConnectToApplication(
+      URLRequestPtr app_request,
+      InterfaceRequest<ServiceProvider> services,
+      ServiceProviderPtr exposed_services,
+      CapabilityFilterPtr filter,
+      const ConnectToApplicationCallback& callback) override;
   void QuitApplication() override;
 
   void CallAcceptConnection(ApplicationInstance* originator,
                             const GURL& url,
                             InterfaceRequest<ServiceProvider> services,
                             ServiceProviderPtr exposed_services,
                             const GURL& requested_url);
 
   void OnConnectionError();
 
   void OnQuitRequestedResult(bool can_quit);
 
   struct QueuedClientRequest {
     QueuedClientRequest();
     ~QueuedClientRequest();
     ApplicationInstance* originator;
     GURL requested_url;
     GURL requestor_url;
     InterfaceRequest<ServiceProvider> services;
     ServiceProviderPtr exposed_services;
     CapabilityFilter filter;
+    ConnectToApplicationCallback connect_callback;
   };
 
   ApplicationManager* const manager_;
   const Identity originator_identity_;
   const Identity identity_;
   const CapabilityFilter filter_;
   const bool allow_any_application_;
+  uint32_t requesting_content_handler_id_;
   base::Closure on_application_end_;
   ApplicationPtr application_;
   Binding<Shell> binding_;
   bool queue_requests_;
   std::vector<QueuedClientRequest*> queued_client_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(ApplicationInstance);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_APPLICATION_INSTANCE_H_