Two changes to desktop aura for tooltips:

ui/views/corewm/tooltip_controller_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/corewm/tooltip_controller.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/tooltip_client.h"
 #include "ui/aura/env.h"
@@ skipping 391 matching lines @@
   EXPECT_TRUE(helper_->IsTooltipTimerRunning());
   helper_->FireTooltipTimer();
   EXPECT_TRUE(helper_->IsTooltipVisible());
   EXPECT_TRUE(helper_->IsTooltipShownTimerRunning());
   string16 expected_tooltip = ASCIIToUTF16("Tooltip Text for view 2");
   EXPECT_EQ(expected_tooltip, aura::client::GetTooltipText(window));
   EXPECT_EQ(expected_tooltip, helper_->GetTooltipText());
   EXPECT_EQ(window, helper_->GetTooltipWindow());
 }
 
+// Verifies a mouse exit event hides the tooltips.
+TEST_F(TooltipControllerTest, HideOnExit) {
+  view_->set_tooltip_text(ASCIIToUTF16("Tooltip Text"));
+  generator_->MoveMouseToCenterOf(GetWindow());
+  string16 expected_tooltip = ASCIIToUTF16("Tooltip Text");
+  EXPECT_EQ(expected_tooltip, aura::client::GetTooltipText(GetWindow()));
+  EXPECT_EQ(string16(), helper_->GetTooltipText());
+  EXPECT_EQ(GetWindow(), helper_->GetTooltipWindow());
+
+  // Fire tooltip timer so tooltip becomes visible.
+  helper_->FireTooltipTimer();
+
+  EXPECT_TRUE(helper_->IsTooltipVisible());
+  generator_->SendMouseExit();
+  EXPECT_FALSE(helper_->IsTooltipVisible());
+}
+
 }  // namespace test
 }  // namespace corewm
 }  // namespace views