Add ScopedObjCClassSwizzler in base/mac, absorbs objc_method_swizzle and ScopedClassSwizzler

ui/views/test/event_generator_delegate_mac.mm

Index: ui/views/test/event_generator_delegate_mac.mm
diff --git a/ui/views/test/event_generator_delegate_mac.mm b/ui/views/test/event_generator_delegate_mac.mm
index 69fd88fd49d1351fc2d28fed2c7e8c9b3c849065..69db8fc9d9c0095d5ca32fc6f5c26e45be725f2d 100644
--- a/ui/views/test/event_generator_delegate_mac.mm
+++ b/ui/views/test/event_generator_delegate_mac.mm
@@ -4,12 +4,12 @@
 
 #import <Cocoa/Cocoa.h>
 
+#import "base/test/scoped_class_swizzler_mac.h"
 #include "ui/events/event_processor.h"
 #include "ui/events/event_target.h"
 #include "ui/events/event_target_iterator.h"
 #include "ui/events/event_targeter.h"
 #include "ui/events/test/event_generator.h"
-#import "ui/events/test/cocoa_test_event_utils.h"
 #include "ui/gfx/mac/coordinate_conversion.h"
 
 namespace {
@@ -283,7 +283,7 @@ class EventGeneratorDelegateMac : public ui::EventTarget,
  private:
   ui::test::EventGenerator* owner_;
   NSWindow* window_;
-  ScopedClassSwizzler swizzle_pressed_;
+  base::ScopedClassSwizzler swizzle_pressed_;
 
   DISALLOW_COPY_AND_ASSIGN(EventGeneratorDelegateMac);
 };