mac: Remove code that was only needed on 10.5

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

Index: chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
index ef20292399344a4f1d19e1e938ce747071ad591b..a36fc347503a54ffe69318231eb16b9fe74087ae 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
@@ -395,7 +395,7 @@ private:
         [[CrTrackingArea alloc] initWithRect:[newTabButton_ bounds]
                                      options:(NSTrackingMouseEnteredAndExited |
                                               NSTrackingActiveAlways)
-                                proxiedOwner:self
+                                       owner:self
                                     userInfo:nil]);
     if (browserWindow)  // Nil for Browsers without a tab strip (e.g. popups).
       [newTabTrackingArea_ clearOwnerWhenWindowWillClose:browserWindow];
@@ -429,7 +429,7 @@ private:
                      NSTrackingMouseMoved |
                      NSTrackingActiveAlways |
                      NSTrackingInVisibleRect
-        proxiedOwner:self
+               owner:self
             userInfo:nil]);
     if (browserWindow)  // Nil for Browsers without a tab strip (e.g. popups).
       [trackingArea_ clearOwnerWhenWindowWillClose:browserWindow];