Implement basic mojo Permission service and use it for Geolocation.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 079f6e9dda954727f32c8ccdb2bd3beaebe05540..8084884ad4e2e23da6186f87583f1a2c459e824b 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -66,6 +66,8 @@
 #include "content/browser/mime_registry_message_filter.h"
 #include "content/browser/mojo/mojo_application_host.h"
 #include "content/browser/notifications/notification_message_filter.h"
+#include "content/browser/permissions/permission_service_context.h"
+#include "content/browser/permissions/permission_service_impl.h"
 #include "content/browser/profiler_message_filter.h"
 #include "content/browser/push_messaging/push_messaging_message_filter.h"
 #include "content/browser/quota_dispatcher_host.h"
@@ -876,6 +878,12 @@ void RenderProcessHostImpl::CreateMessageFilters() {
 void RenderProcessHostImpl::RegisterMojoServices() {
   mojo_application_host_->service_registry()->AddService(
       base::Bind(&device::BatteryMonitorImpl::Create));
+
+  if (!permission_service_context_)
+    permission_service_context_.reset(new PermissionServiceContext(nullptr));
+  mojo_application_host_->service_registry()->AddService(
+      base::Bind(&PermissionServiceContext::CreateService,
+                 base::Unretained(permission_service_context_.get())));
 }
 
 int RenderProcessHostImpl::GetNextRoutingID() {