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 b3f043434e3c1fee1a73a3406e6b62d95d30cc3a..7ac5fa187d9674b525b7bdbea5319d7a730b2574 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
+++ b/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
@@ -346,6 +346,26 @@ 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());
+}
+
+// Tests that when an accelerometer event is received which has no keyboard that
+// we enter maximize mode.
+TEST_F(MaximizeModeControllerTest,
+       NoKeyboardAccelerometerTriggersMaximizeMode) {
+  ASSERT_FALSE(IsMaximizeModeStarted());
+  TriggerLidUpdate(gfx::Vector3dF(0.0f, 0.0f, kMeanGravity));
+  ASSERT_TRUE(IsMaximizeModeStarted());
+}
+
 class MaximizeModeControllerSwitchesTest : public MaximizeModeControllerTest {
  public:
   MaximizeModeControllerSwitchesTest() {}