Remove content::BrowserThread knowledge from Device Sensors

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 02b0a5714686eac96ae977e7d293c1f0416373f0..9474c02306e364dfc5b4292314b95f809afcc9d7 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -1164,7 +1164,7 @@ void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
   }
   {
     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
-    DeviceSensorService::GetInstance()->Shutdown();
+    DeviceSensorService::GetInstance()->ShutDownOnUIThread();
   }
 #if !defined(OS_ANDROID)
   {
@@ -1342,7 +1342,7 @@ int BrowserMainLoop::BrowserThreadsStarted() {
 
   {
     TRACE_EVENT0("startup",
-      "BrowserMainLoop::BrowserThreadsStarted::SaveFileManager");
+                 "BrowserMainLoop::BrowserThreadsStarted::SaveFileManager");
     save_file_manager_ = new SaveFileManager();
   }