Add Nullity check for instant service

chrome/browser/ui/views/location_bar/location_bar_view.cc

Index: chrome/browser/ui/views/location_bar/location_bar_view.cc
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.cc b/chrome/browser/ui/views/location_bar/location_bar_view.cc
index 9d19ce3b25a624e5f69cff4df39210adeb33c9f4..c826d3dc976344dadd7d34ecc4dec1f0e4d61042 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.cc
@@ -1274,8 +1274,10 @@ const char* LocationBarView::GetClassName() const {
 }
 
 void LocationBarView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
-  InstantServiceFactory::GetForProfile(profile())->OnOmniboxStartMarginChanged(
-      bounds().x());
+  InstantService* instant_service =
+      InstantServiceFactory::GetForProfile(profile());
+  if (instant_service)
+    instant_service->OnOmniboxStartMarginChanged(bounds().x());
 
   OmniboxPopupView* popup = omnibox_view_->model()->popup_model()->view();
   if (popup->IsOpen())