Capitalize "Cocoa" in c/b/ui/cocoa/extensions/.

chrome/browser/ui/cocoa/extensions/browser_action_button.mm

Index: chrome/browser/ui/cocoa/extensions/browser_action_button.mm
diff --git a/chrome/browser/ui/cocoa/extensions/browser_action_button.mm b/chrome/browser/ui/cocoa/extensions/browser_action_button.mm
index 1dd98b22600d35447c32b167873b12e309a3b04b..e07469a73549d5628207757e46f9fe2d35da0692 100644
--- a/chrome/browser/ui/cocoa/extensions/browser_action_button.mm
+++ b/chrome/browser/ui/cocoa/extensions/browser_action_button.mm
@@ -384,7 +384,7 @@ void ToolbarActionViewDelegateBridge::DoShowContextMenu() {
 - (void)onRemoved {
   // The button is being removed from the toolbar, and the backing controller
   // will also be removed. Destroy the delegate.
-  // We only need to do this because in cocoa's memory management, removing the
+  // We only need to do this because in Cocoa's memory management, removing the
   // button from the toolbar doesn't synchronously dealloc it.
   viewControllerDelegate_.reset();
 }