Correcly Report CanEnterMaximizeMode on devices without accelerometers

ash/wm/maximize_mode/maximize_mode_controller_unittest.cc

Index: ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
diff --git a/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc b/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
index bed25857e0feeeea5630c7d12d2d0529b4a596b0..3705a4674a4047b6076251a90b20a24bc6c3cf23 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
+++ b/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
@@ -345,6 +345,17 @@ TEST_F(MaximizeModeControllerTest, MaximizeModeTest) {
   }
 }
 
+// Tests that when and empty accelerometer update is received for attaching as a
+// chromeos::AccelerometerReader::Observer, that CanEnterMaximizeMode returns
+// false, and that valid accelerometer events allow entering maximize mode.
+TEST_F(MaximizeModeControllerTest,
+       CanEnterMaximizeModeRequiresValidAccelerometerUpdate) {
+  // Should be false until an accelerometer event is sent.
+  ASSERT_FALSE(maximize_mode_controller()->CanEnterMaximizeMode());
+  OpenLidToAngle(90.0f);
+  EXPECT_TRUE(maximize_mode_controller()->CanEnterMaximizeMode());
+}
+
 class MaximizeModeControllerSwitchesTest : public MaximizeModeControllerTest {
  public:
   MaximizeModeControllerSwitchesTest() {}