Support exposing Mojo services between render frames, render threads, and their respective hosts.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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.
 
 #include "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/metrics/user_metrics_action.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/frame_host/cross_site_transferring_request.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/render_frame_host_delegate.h"
 #include "content/browser/frame_host/render_frame_proxy_host.h"
 #include "content/browser/renderer_host/input/input_router.h"
 #include "content/browser/renderer_host/input/timeout_monitor.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/common/desktop_notification_messages.h"
 #include "content/common/frame_messages.h"
 #include "content/common/input_messages.h"
 #include "content/common/inter_process_time_ticks_converter.h"
+#include "content/common/render_frame_setup.mojom.h"
 #include "content/common/swapped_out_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/desktop_notification_delegate.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/url_utils.h"
@@ skipping 79 matching lines @@
     case blink::WebTextDirectionLeftToRight:
       return base::i18n::LEFT_TO_RIGHT;
     case blink::WebTextDirectionRightToLeft:
       return base::i18n::RIGHT_TO_LEFT;
     default:
       NOTREACHED();
       return base::i18n::UNKNOWN_DIRECTION;
   }
 }
 
+class RenderFrameSetupImpl : public mojo::InterfaceImpl<RenderFrameSetup> {
+ public:
+  explicit RenderFrameSetupImpl(int process_id) : process_id_(process_id) {}
+
+  virtual void ConnectToInterfaceProvider(

[darin (slow to review), 2014/06/12 05:27:12]

@davemoore and I were again discussing the names of things today. We seem to
have arrived at InterfaceProvider -> ServiceProvider because "applications vend
services" and "services implement interfaces".

I think this may be a good fit for this CL. Maybe a ServiceRegistry is a
ServiceProvider? That makes sense.

[Sam McNally, 2014/06/12 08:56:39]

Sounds reasonable, but I'd like to stick with IInterfaceProvider for now just to
avoid clashing with the old ServiceProvider.

+      int32_t view_routing_id,
+      mojo::ScopedMessagePipeHandle handle) OVERRIDE {
+    RenderFrameHostImpl* frame_host = static_cast<RenderFrameHostImpl*>(
+        RenderFrameHost::FromID(process_id_, view_routing_id));
+    if (!frame_host)
+      return;
+
+    frame_host->BindServiceRegistry(handle.Pass());
+  }
+
+  virtual void OnConnectionError() OVERRIDE { delete this; }
+
+ private:
+  const int process_id_;
+};
+
+void CreateRenderFrameHostSetup(int process_id,
+                                mojo::ScopedMessagePipeHandle handle) {
+  mojo::BindToPipe(new RenderFrameSetupImpl(process_id), handle.Pass());
+}
+
 }  // namespace
 
 RenderFrameHost* RenderFrameHost::FromID(int render_process_id,
                                          int render_frame_id) {
   return RenderFrameHostImpl::FromID(render_process_id, render_frame_id);
 }
 
 // static
 RenderFrameHostImpl* RenderFrameHostImpl::FromID(
     int process_id, int routing_id) {
@@ skipping 18 matching lines @@
       frame_tree_(frame_tree),
       frame_tree_node_(frame_tree_node),
       routing_id_(routing_id),
       is_swapped_out_(is_swapped_out),
       weak_ptr_factory_(this) {
   frame_tree_->RegisterRenderFrameHost(this);
   GetProcess()->AddRoute(routing_id_, this);
   g_routing_id_frame_map.Get().insert(std::make_pair(
       RenderFrameHostID(GetProcess()->GetID(), routing_id_),
       this));
+
+  if (GetProcess()->GetServiceRegistry()) {
+    GetProcess()->GetServiceRegistry()->AddService<RenderFrameSetup>(
+        base::Bind(CreateRenderFrameHostSetup, GetProcess()->GetID()));
+  }
 }
 
 RenderFrameHostImpl::~RenderFrameHostImpl() {
   GetProcess()->RemoveRoute(routing_id_);
   g_routing_id_frame_map.Get().erase(
       RenderFrameHostID(GetProcess()->GetID(), routing_id_));
   if (delegate_)
     delegate_->RenderFrameDeleted(this);
 
   // Notify the FrameTree that this RFH is going away, allowing it to shut down
@@ skipping 60 matching lines @@
   Send(new FrameMsg_JavaScriptExecuteRequest(routing_id_,
                                              javascript,
                                              key, true));
   javascript_callbacks_.insert(std::make_pair(key, callback));
 }
 
 RenderViewHost* RenderFrameHostImpl::GetRenderViewHost() {
   return render_view_host_;
 }
 
+ServiceRegistry* RenderFrameHostImpl::GetServiceRegistry() {
+  return &service_registry_;
+}
+
 bool RenderFrameHostImpl::Send(IPC::Message* message) {
   if (IPC_MESSAGE_ID_CLASS(message->type()) == InputMsgStart) {
     return render_view_host_->input_router()->SendInput(
         make_scoped_ptr(message));
   }
 
   if (render_view_host_->IsSwappedOut()) {
     DCHECK(render_frame_proxy_host_);
     return render_frame_proxy_host_->Send(message);
   }
@@ skipping 635 matching lines @@
 void RenderFrameHostImpl::NotificationClosed(int notification_id) {
   cancel_notification_callbacks_.erase(notification_id);
 }
 
 void RenderFrameHostImpl::DesktopNotificationPermissionRequestDone(
     int callback_context) {
   Send(new DesktopNotificationMsg_PermissionRequestDone(
       routing_id_, callback_context));
 }
 
+void RenderFrameHostImpl::BindServiceRegistry(
+    mojo::ScopedMessagePipeHandle shell_handle) {
+  service_registry_.Bind(shell_handle.Pass());
+}
+
 }  // namespace content