Consolidate message observer API for win and aura (and touch).

base/message_pump_win.cc

Index: base/message_pump_win.cc
diff --git a/base/message_pump_win.cc b/base/message_pump_win.cc
index 9d0ec53a3ea803d693d025b4cec31541b7562e92..4031804ca4f4fa9c701f99df74a899e337a4a537 100644
--- a/base/message_pump_win.cc
+++ b/base/message_pump_win.cc
@@ -29,12 +29,12 @@ void MessagePumpWin::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
-void MessagePumpWin::WillProcessMessage(const MSG& msg) {
-  FOR_EACH_OBSERVER(Observer, observers_, WillProcessMessage(msg));
+void MessagePumpWin::WillProcessEvent(const MSG& msg) {
+  FOR_EACH_OBSERVER(Observer, observers_, WillProcessEvent(msg));
 }
 
-void MessagePumpWin::DidProcessMessage(const MSG& msg) {
-  FOR_EACH_OBSERVER(Observer, observers_, DidProcessMessage(msg));
+void MessagePumpWin::DidProcessEvent(const MSG& msg) {
+  FOR_EACH_OBSERVER(Observer, observers_, DidProcessEvent(msg));
 }
 
 void MessagePumpWin::RunWithDispatcher(