Bug 705154 - Hang monitor incorrectly killing the app on mac when the user is idle: unlike other platforms, the main loop on Mac doesn't call processNextEvent in a loop: instead it calls into [NSApplication run] and we check whether there are pending XPCOM events during processing. Suspend the hang monitor when we pause for incoming events by subclassing [NSApplication nextEventMatchingMask], r=smichaud

--HG--
extra : rebase_source : 753343ca11d3ce8b6801a5be8831621887fbe70b

widget/src/cocoa/nsAppShell.mm

@@ -183,6 +183,7 @@ bool nsCocoaAppModalWindowList::GeckoModalAboveCocoaModal()
 @end
 
 @implementation GeckoNSApplication
+
 - (void)sendEvent:(NSEvent *)anEvent
 {
   mozilla::HangMonitor::NotifyActivity();
@@ -193,6 +194,19 @@ bool nsCocoaAppModalWindowList::GeckoModalAboveCocoaModal()
   }
   [super sendEvent:anEvent];
 }
+
+- (NSEvent*)nextEventMatchingMask:(NSUInteger)mask
+                        untilDate:(NSDate*)expiration
+                           inMode:(NSString*)mode
+                          dequeue:(BOOL)flag
+{
+  if (expiration) {
+    mozilla::HangMonitor::Suspend();
+  }
+  return [super nextEventMatchingMask:mask
+          untilDate:expiration inMode:mode dequeue:flag];
+}
+
 @end