Reduce FOR_EACH_OBSERVER usage in ui/

ui/events/devices/device_data_manager.cc

Index: ui/events/devices/device_data_manager.cc
diff --git a/ui/events/devices/device_data_manager.cc b/ui/events/devices/device_data_manager.cc
index b54cd56c33d5055d6ec6e31c2264de7cc2029724..2a426c6e7bec4b6113468ea6b29dc09a3ac2c4d6 100644
--- a/ui/events/devices/device_data_manager.cc
+++ b/ui/events/devices/device_data_manager.cc
@@ -12,9 +12,10 @@
 #include "ui/gfx/geometry/point3_f.h"
 
 // This macro provides the implementation for the observer notification methods.
-#define NOTIFY_OBSERVERS(method_decl, observer_call)                        \
-  void DeviceDataManager::method_decl {                                     \
-    FOR_EACH_OBSERVER(InputDeviceEventObserver, observers_, observer_call); \
+#define NOTIFY_OBSERVERS(method_decl, observer_call) \
+  void DeviceDataManager::method_decl {              \
+    for (auto& observer : observers_)                \
+      observer.observer_call;                        \
   }
 
 namespace ui {