Fix a minor typo: dispostion -> disposition

ui/wm/core/focus_controller_unittest.cc

Index: ui/wm/core/focus_controller_unittest.cc
diff --git a/ui/wm/core/focus_controller_unittest.cc b/ui/wm/core/focus_controller_unittest.cc
index 6bd6091834835d66916e3085e767cbad099c56c3..6cb5604b8eefa3d859a2c22bcce69fdc2e32185a 100644
--- a/ui/wm/core/focus_controller_unittest.cc
+++ b/ui/wm/core/focus_controller_unittest.cc
@@ -971,7 +971,7 @@ class FocusControllerImplicitTestBase : public FocusControllerTestBase {
 
   // Allow each disposition change test to add additional post-disposition
   // change expectations.
-  virtual void PostDispostionChangeExpectations() {}
+  virtual void PostDispositionChangeExpectations() {}
 
   // Overridden from FocusControllerTestBase:
   void BasicFocus() override {
@@ -996,7 +996,7 @@ class FocusControllerImplicitTestBase : public FocusControllerTestBase {
 
     ChangeWindowDisposition(w2);
     EXPECT_EQ(3, GetActiveWindowId());
-    PostDispostionChangeExpectations();
+    PostDispositionChangeExpectations();
   }
   void FocusEvents() override {
     aura::Window* w211 = root_window()->GetChildById(211);