Disabling extended desktop (by default).

ash/screen_ash_unittest.cc

Index: ash/screen_ash_unittest.cc
diff --git a/ash/screen_ash_unittest.cc b/ash/screen_ash_unittest.cc
index 36ab21cef0da41310509d12be57ac35c67bb33e2..6bb3b72b2cc21ad1c2c5655a568fd77ba596d602 100644
--- a/ash/screen_ash_unittest.cc
+++ b/ash/screen_ash_unittest.cc
@@ -16,8 +16,24 @@
 
 namespace ash {
 namespace test {
+class ScreenAshTest : public test::AshTestBase {
+ public:
+  ScreenAshTest() {}
+  virtual ~ScreenAshTest() {}
 
-typedef test::AshTestBase ScreenAshTest;
+  virtual void SetUp() OVERRIDE {
+    internal::DisplayController::SetExtendedDesktopEnabled(true);
+    AshTestBase::SetUp();
+  }
+
+  virtual void TearDown() OVERRIDE {
+    AshTestBase::TearDown();
+    internal::DisplayController::SetExtendedDesktopEnabled(false);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScreenAshTest);
+};
 
 #if !defined(OS_WIN)
 TEST_F(ScreenAshTest, Bounds) {