Mojoify time zone update IPC from browser to renderer

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 7a225cf71b03d35c77ce75c3c717b481640fabee..a9b8a33a7e21419a2314b382a6a88be203f241a9 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -120,6 +120,7 @@
 #include "content/browser/speech/speech_recognition_dispatcher_host.h"
 #include "content/browser/storage_partition_impl.h"
 #include "content/browser/streams/stream_context.h"
+#include "content/browser/time_zone_monitor.h"
 #include "content/browser/tracing/trace_message_filter.h"
 #include "content/browser/websockets/websocket_manager.h"
 #include "content/browser/webui/web_ui_controller_factory_registry.h"
@@ -1235,6 +1236,16 @@ void RenderProcessHostImpl::RegisterMojoInterfaces() {
         registry.get(), base::Bind(&CreateMemoryCoordinatorHandle, GetID()));
   }
 
+  // BrowserMainLoop, which owns TimeZoneMonitor, is alive for the lifetime of
+  // Mojo communication (see BrowserMainLoop::ShutdownThreadsAndCleanUp(),
+  // which shuts down Mojo). Hence, passing that TimeZoneMonitor instance as
+  // a raw pointer here is safe.
+  AddUIThreadInterface(
+      registry.get(),
+      base::Bind(&TimeZoneMonitor::Bind,
+                 base::Unretained(
+                     BrowserMainLoop::GetInstance()->time_zone_monitor())));
+
   scoped_refptr<base::SingleThreadTaskRunner> file_task_runner =
       BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE);
   registry->AddInterface(base::Bind(&MimeRegistryImpl::Create),
@@ -1289,10 +1300,6 @@ void RenderProcessHostImpl::ResumeDeferredNavigation(
   widget_helper_->ResumeDeferredNavigation(request_id);
 }
 
-void RenderProcessHostImpl::NotifyTimezoneChange(const std::string& zone_id) {
-  Send(new ViewMsg_TimezoneChange(zone_id));
-}
-
 shell::InterfaceProvider* RenderProcessHostImpl::GetRemoteInterfaces() {
   return mojo_child_connection_->GetRemoteInterfaces();
 }