base: Do not allow MessagePumpObservers to consume events.

base/message_loop/message_pump_x11.h

Index: base/message_loop/message_pump_x11.h
diff --git a/base/message_loop/message_pump_x11.h b/base/message_loop/message_pump_x11.h
index ce20d5d333cf0f86be9e64a282a05af46bf486e7..51d421fd6b0d5d1c9c3917d678a6af568de0e605 100644
--- a/base/message_loop/message_pump_x11.h
+++ b/base/message_loop/message_pump_x11.h
@@ -86,10 +86,8 @@ class BASE_EXPORT MessagePumpX11 : public MessagePumpGlib,
   // Dispatches the event to the specified dispatcher.
   void ProcessXEvent(MessagePumpDispatcher* dispatcher, XEvent* event);
 
-  // Sends the event to the observers. If an observer returns true, then it does
-  // not send the event to any other observers and returns true. Returns false
-  // if no observer returns true.
-  bool WillProcessXEvent(XEvent* xevent);
+  // Sends the event to the observers.
+  void WillProcessXEvent(XEvent* xevent);
   void DidProcessXEvent(XEvent* xevent);
 
   // Returns the Dispatcher based on the event's target window.