[Mac] Add MessagePumpMac callouts to com.apple.hitoolbox.windows.windowfadingmode.

base/message_loop/message_pump_mac.mm

Index: base/message_loop/message_pump_mac.mm
diff --git a/base/message_loop/message_pump_mac.mm b/base/message_loop/message_pump_mac.mm
index b50ea6878813ba1f047cfc291e731c53f3d9fe90..dd1cc88ba9df9d60f965c748321008f85a6083bb 100644
--- a/base/message_loop/message_pump_mac.mm
+++ b/base/message_loop/message_pump_mac.mm
@@ -26,38 +26,53 @@ namespace base {
 
 namespace {
 
+const CFStringRef kAllModes[] = {
+  kCFRunLoopCommonModes,
+  kMessageLoopExclusiveRunLoopMode,
+
+  // Process work when NSMenus are fading out.
+  CFSTR("com.apple.hitoolbox.windows.windowfadingmode"),
+
+  // Process work when AppKit is highlighting an item on the main menubar.
+  CFSTR("NSUnhighlightMenuRunLoopMode"),
+
+  // Other modes that aren't strictly necessary:
+  //CFSTR("com.apple.hitoolbox.windows.transitionmode"),
+  //CFSTR("com.apple.hitoolbox.windows.flushmode"),
+};
+
 void CFRunLoopAddSourceToAllModes(CFRunLoopRef rl, CFRunLoopSourceRef source) {
-  CFRunLoopAddSource(rl, source, kCFRunLoopCommonModes);
-  CFRunLoopAddSource(rl, source, kMessageLoopExclusiveRunLoopMode);
+  for (const auto& mode : kAllModes)
+    CFRunLoopAddSource(rl, source, mode);
 }
 
 void CFRunLoopRemoveSourceFromAllModes(CFRunLoopRef rl,
                                        CFRunLoopSourceRef source) {
-  CFRunLoopRemoveSource(rl, source, kCFRunLoopCommonModes);
-  CFRunLoopRemoveSource(rl, source, kMessageLoopExclusiveRunLoopMode);
+  for (const auto& mode : kAllModes)
+    CFRunLoopRemoveSource(rl, source, mode);
 }
 
 void CFRunLoopAddTimerToAllModes(CFRunLoopRef rl, CFRunLoopTimerRef timer) {
-  CFRunLoopAddTimer(rl, timer, kCFRunLoopCommonModes);
-  CFRunLoopAddTimer(rl, timer, kMessageLoopExclusiveRunLoopMode);
+  for (const auto& mode : kAllModes)
+    CFRunLoopAddTimer(rl, timer, mode);
 }
 
 void CFRunLoopRemoveTimerFromAllModes(CFRunLoopRef rl,
                                       CFRunLoopTimerRef timer) {
-  CFRunLoopRemoveTimer(rl, timer, kCFRunLoopCommonModes);
-  CFRunLoopRemoveTimer(rl, timer, kMessageLoopExclusiveRunLoopMode);
+  for (const auto& mode : kAllModes)
+    CFRunLoopRemoveTimer(rl, timer, mode);
 }
 
 void CFRunLoopAddObserverToAllModes(CFRunLoopRef rl,
                                     CFRunLoopObserverRef observer) {
-  CFRunLoopAddObserver(rl, observer, kCFRunLoopCommonModes);
-  CFRunLoopAddObserver(rl, observer, kMessageLoopExclusiveRunLoopMode);
+  for (const auto& mode : kAllModes)
+    CFRunLoopAddObserver(rl, observer, mode);
 }
 
 void CFRunLoopRemoveObserverFromAllModes(CFRunLoopRef rl,
                                          CFRunLoopObserverRef observer) {
-  CFRunLoopRemoveObserver(rl, observer, kCFRunLoopCommonModes);
-  CFRunLoopRemoveObserver(rl, observer, kMessageLoopExclusiveRunLoopMode);
+  for (const auto& mode : kAllModes)
+    CFRunLoopRemoveObserver(rl, observer, mode);
 }
 
 void NoOp(void* info) {