mac: Load the system hotkeys after launch.

chrome/browser/ui/cocoa/system_hotkey_map.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/system_hotkey_map.h"
 
-#import <Cocoa/Cocoa.h>
-
 #pragma mark - NSDictionary Helper Functions
 
 namespace {
 
 // All 4 following functions return nil if the object doesn't exist, or isn't of
 // the right class.
 id ObjectForKey(NSDictionary* dict, NSString* key, Class aClass) {
   id object = [dict objectForKey:key];
   if (![object isKindOfClass:aClass])
     return nil;
@@ skipping 24 matching lines @@
 #pragma mark - SystemHotkeyMap
 
 SystemHotkeyMap::SystemHotkeyMap() {
 }
 SystemHotkeyMap::~SystemHotkeyMap() {
 }
 
 bool SystemHotkeyMap::ParseData(NSData* data) {
   system_hotkeys_.clear();
 
+  if (!data)
+    return false;
+
   NSError* error = nil;
   NSPropertyListFormat format;
   NSDictionary* dictionary =
       [NSPropertyListSerialization propertyListWithData:data
                                                 options:0
                                                  format:&format
                                                   error:&error];
   if (error)
     return false;
 
@@ skipping 33 matching lines @@
     NSNumber* modifiers = [parameters objectAtIndex:2];
     if (![modifiers isKindOfClass:[NSNumber class]])
       continue;
 
     ReserveHotkey(key_code.intValue, modifiers.intValue, hotkey_system_effect);
   }
 
   return true;
 }
 
-bool SystemHotkeyMap::IsHotkeyReserved(int key_code, int modifiers) {
-  std::vector<SystemHotkey>::iterator it;
+bool SystemHotkeyMap::IsEventReserved(NSEvent* event) const {
+  NSUInteger modifiers =
+      NSShiftKeyMask | NSControlKeyMask | NSCommandKeyMask | NSAlternateKeyMask;
+  return IsHotkeyReserved(event.keyCode, event.modifierFlags & modifiers);
+}
+
+bool SystemHotkeyMap::IsHotkeyReserved(int key_code, int modifiers) const {
+  std::vector<SystemHotkey>::const_iterator it;
   for (it = system_hotkeys_.begin(); it != system_hotkeys_.end(); ++it) {
     if (it->key_code == key_code && it->modifiers == modifiers)
       return true;
   }
   return false;
 }
 
 void SystemHotkeyMap::ReserveHotkey(int key_code,
                                     int modifiers,
                                     NSString* system_effect) {
   ReserveHotkey(key_code, modifiers);
 
   // If a hotkey exists for toggling through the windows of an application, then
   // adding shift to that hotkey toggles through the windows backwards.
   if ([system_effect isEqualToString:@"27"])
     ReserveHotkey(key_code, modifiers | NSShiftKeyMask);
 }
 
 void SystemHotkeyMap::ReserveHotkey(int key_code, int modifiers) {
   SystemHotkey hotkey;
   hotkey.key_code = key_code;
   hotkey.modifiers = modifiers;
   system_hotkeys_.push_back(hotkey);
 }