[MacViews] Enable dragging a window by its caption/draggable areas.

chrome/browser/apps/app_shim/app_shim_interactive_uitest_mac.mm

Index: chrome/browser/apps/app_shim/app_shim_interactive_uitest_mac.mm
diff --git a/chrome/browser/apps/app_shim/app_shim_interactive_uitest_mac.mm b/chrome/browser/apps/app_shim/app_shim_interactive_uitest_mac.mm
index 4c1b143935cc5ceb876c35868bb39946595ce267..5eb10d199ae422aae6e6eaa6c3350386fd8fe0f2 100644
--- a/chrome/browser/apps/app_shim/app_shim_interactive_uitest_mac.mm
+++ b/chrome/browser/apps/app_shim/app_shim_interactive_uitest_mac.mm
@@ -35,6 +35,7 @@
 #include "extensions/browser/app_window/native_app_window.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/test/extension_test_message_listener.h"
+#import "ui/base/test/windowed_nsnotification_observer.h"
 #import "ui/events/test/cocoa_test_event_utils.h"
 
 namespace {
@@ -301,59 +302,6 @@ Browser* GetFirstHostedAppWindow() {
 
 }  // namespace
 
-// Watches for NSNotifications from the shared workspace.
-@interface WindowedNSNotificationObserver : NSObject {
- @private
-  base::scoped_nsobject<NSString> bundleId_;
-  BOOL notificationReceived_;
-  scoped_ptr<base::RunLoop> runLoop_;
-}
-
-- (id)initForNotification:(NSString*)name
-              andBundleId:(NSString*)bundleId;
-- (void)observe:(NSNotification*)notification;
-- (void)wait;
-@end
-
-@implementation WindowedNSNotificationObserver
-
-- (id)initForNotification:(NSString*)name
-              andBundleId:(NSString*)bundleId {
-  if (self = [super init]) {
-    bundleId_.reset([[bundleId copy] retain]);
-    [[[NSWorkspace sharedWorkspace] notificationCenter]
-        addObserver:self
-           selector:@selector(observe:)
-               name:name
-             object:nil];
-  }
-  return self;
-}
-
-- (void)observe:(NSNotification*)notification {
-  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-
-  NSRunningApplication* application =
-      [[notification userInfo] objectForKey:NSWorkspaceApplicationKey];
-  if (![[application bundleIdentifier] isEqualToString:bundleId_])
-    return;
-
-  [[[NSWorkspace sharedWorkspace] notificationCenter] removeObserver:self];
-  notificationReceived_ = YES;
-  if (runLoop_.get())
-    runLoop_->Quit();
-}
-
-- (void)wait {
-  if (notificationReceived_)
-    return;
-
-  runLoop_.reset(new base::RunLoop);
-  runLoop_->Run();
-}
-
-@end
-
 namespace apps {
 
 // Shims require static libraries http://crbug.com/386024.