Added text filtering to Overview Mode

ash/accelerators/accelerator_controller_unittest.cc

Index: ash/accelerators/accelerator_controller_unittest.cc
diff --git a/ash/accelerators/accelerator_controller_unittest.cc b/ash/accelerators/accelerator_controller_unittest.cc
index ab3ec88e63d0c670aad84c9852b3799653316374..4fecc24d5b4c18d70b09ef9d15994207e3ee0b43 100644
--- a/ash/accelerators/accelerator_controller_unittest.cc
+++ b/ash/accelerators/accelerator_controller_unittest.cc
@@ -1230,18 +1230,20 @@ TEST_F(AcceleratorControllerTest, DisallowedWithNoWindow) {
   }
 
   // Make sure we don't alert if we do have a window.
-  scoped_ptr<aura::Window> window(
-      CreateTestWindowInShellWithBounds(gfx::Rect(5, 5, 20, 20)));
-  wm::ActivateWindow(window.get());
+  scoped_ptr<aura::Window> window;
   for (size_t i = 0; i < kActionsNeedingWindowLength; ++i) {
+    window.reset(CreateTestWindowInShellWithBounds(gfx::Rect(5, 5, 20, 20)));

[Nina, 2014/07/04 20:51:10]

This is to avoid calling "minimize" on a  window in overview mode, which
crashes. Since the test has no way of knowing what the actions it calls do, it's
nicer to reset the state of the window each time an action is executed. WDYT?

[oshima, 2014/07/07 23:30:57]

Requesting minimize in overview mode should not cause a crash. (App window can
minimize it self, for example)

+    wm::ActivateWindow(window.get());
     delegate->TriggerAccessibilityAlert(A11Y_ALERT_NONE);
     GetController()->PerformAction(kActionsNeedingWindow[i], dummy);
     EXPECT_NE(delegate->GetLastAccessibilityAlert(), A11Y_ALERT_WINDOW_NEEDED);
   }
 
   // Don't alert if we have a minimized window either.
-  GetController()->PerformAction(WINDOW_MINIMIZE, dummy);
   for (size_t i = 0; i < kActionsNeedingWindowLength; ++i) {
+    window.reset(CreateTestWindowInShellWithBounds(gfx::Rect(5, 5, 20, 20)));
+    wm::ActivateWindow(window.get());
+    GetController()->PerformAction(WINDOW_MINIMIZE, dummy);
     delegate->TriggerAccessibilityAlert(A11Y_ALERT_NONE);
     GetController()->PerformAction(kActionsNeedingWindow[i], dummy);
     EXPECT_NE(delegate->GetLastAccessibilityAlert(), A11Y_ALERT_WINDOW_NEEDED);