Ignore accelerometer readings which appear to be noisy.

BUG=359709,359685
TEST=MaximizeModeControllerTest.LaptopTest,MaximizeModeControllerTest,MaximizeModeTest

Review URL: https://codereview.chromium.org/235573004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@263536 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 924 insertions, 7 deletions

diff --git a/ash/accelerometer/accelerometer_observer.h b/ash/accelerometer/accelerometer_observer.h
index 3d70a42..43e15ab 100644
--- a/ash/accelerometer/accelerometer_observer.h
+++ b/ash/accelerometer/accelerometer_observer.h
@@ -14,6 +14,8 @@ namespace ash {
 // The interface for classes which observe accelerometer updates.
 class AccelerometerObserver {
  public:
+  // Invoked when an accelerometer reading has been taken. The |base| and |lid|
+  // accelerometer readings are in G's.
   virtual void OnAccelerometerUpdated(const gfx::Vector3dF& base,
                                       const gfx::Vector3dF& lid) = 0;
 
diff --git a/ash/ash.gyp b/ash/ash.gyp
index 290271d..8f844a6 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -995,6 +995,7 @@
         'wm/gestures/overview_gesture_handler_unittest.cc',
         'wm/immersive_fullscreen_controller_unittest.cc',
         'wm/lock_state_controller_unittest.cc',
+        'wm/maximize_mode/accelerometer_test_data_literals.cc',
         'wm/maximize_mode/maximize_mode_controller_unittest.cc',
         'wm/maximize_mode/maximize_mode_window_manager_unittest.cc',
         'wm/mru_window_tracker_unittest.cc',
diff --git a/ash/wm/maximize_mode/accelerometer_test_data_literals.cc b/ash/wm/maximize_mode/accelerometer_test_data_literals.cc
new file mode 100644
index 0000000..af3e731
--- /dev/null
+++ b/ash/wm/maximize_mode/accelerometer_test_data_literals.cc
@@ -0,0 +1,836 @@
+// Copyright 2014 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 "base/macros.h"
+
+namespace ash {
+
+extern const float kAccelerometerLaptopModeTestData[] = {
+    -0.166016f, -0.00488281f, 0.924805f, -0.770508f, -0.0488281f, -0.510742f,
+    -0.199219f, -0.0078125f, 0.953125f, -0.782227f, -0.0244141f, -0.652344f,
+    -0.177734f, -0.0136719f, 0.936523f, -0.772461f, -0.0527344f, -0.59375f,
+    -0.176758f, -0.00878906f, 0.9375f, -0.777344f, -0.0419922f, -0.637695f,
+    -0.165039f, -0.00878906f, 0.942383f, -0.782227f, -0.046875f, -0.613281f,
+    -0.180664f, -0.00976562f, 0.943359f, -0.777344f, -0.0419922f, -0.601562f,
+    -0.189453f, -0.00488281f, 0.943359f, -0.776367f, -0.0263672f, -0.613281f,
+    -0.166992f, -0.00488281f, 0.935547f, -0.78125f, -0.0380859f, -0.609375f,
+    -0.176758f, -0.00878906f, 0.947266f, -0.790039f, -0.0576172f, -0.585938f,
+    -0.173828f, -0.0126953f, 0.93457f, -0.780273f, -0.0654297f, -0.666016f,
+    -0.169922f, -0.00195312f, 0.928711f, -0.775391f, -0.0351562f, -0.561523f,
+    -0.193359f, 0.0f, 0.941406f, -0.795898f, -0.0478516f, -0.640625f,
+    -0.162109f, -0.00585938f, 0.917969f, -0.768555f, -0.0146484f, -0.685547f,
+    -0.166992f, -0.0136719f, 0.921875f, -0.755859f, -0.0166016f, -0.425781f,
+    -0.175781f, -0.0810547f, 1.00098f, -0.802734f, -0.117188f, -0.585938f,
+    -0.210938f, 0.0214844f, 0.881836f, -0.750977f, -0.0302734f, -0.677734f,
+    -0.285156f, 0.00976562f, 0.967773f, -0.763672f, -0.0283203f, -0.850586f,
+    -0.222656f, -0.0136719f, 0.943359f, -0.763672f, -0.0507812f, -0.640625f,
+    -0.236328f, 0.0859375f, 0.892578f, -0.742188f, 0.0302734f, -0.484375f,
+    -0.269531f, 0.0263672f, 0.913086f, -0.714844f, -0.00585938f, -0.745117f,
+    -0.275391f, 0.0927734f, 0.977539f, -0.776367f, -0.078125f, -0.750977f,
+    -0.155273f, -0.0341797f, 1.2334f, -1.06445f, -0.0478516f, -0.823242f,
+    -0.196289f, 0.046875f, 1.19141f, -1.00391f, -0.140625f, -0.541016f,
+    0.0917969f, 0.21582f, 0.717773f, -0.764648f, -0.0341797f, -0.607422f,
+    -0.0351562f, 0.0888672f, 0.207031f, -0.214844f, -0.18457f, -0.0664062f,
+    -0.0898438f, 0.0556641f, 0.418945f, -0.232422f, 0.43457f, 0.0361328f,
+    0.143555f, 0.376953f, 1.23633f, -1.09082f, 0.529297f, 0.0507812f,
+    0.205078f, 0.438477f, 1.66602f, -1.59668f, 0.325195f, -1.20996f,
+    -0.0791016f, 0.404297f, 1.50977f, -1.40918f, 0.31543f, -1.30273f,
+    -0.0654297f, 0.141602f, 0.699219f, -0.589844f, 0.0732422f, -0.27832f,
+    0.00488281f, 0.00683594f, 0.0566406f, -0.0410156f, -0.0292969f, -0.0234375f,
+    -0.0488281f, -0.00195312f, -0.0292969f, 0.0849609f, -0.139648f, 0.0585938f,
+    0.677734f, 0.667969f, 1.36523f, -1.11816f, 0.412109f, 0.844727f,
+    0.142578f, 0.790039f, 1.73145f, -1.68066f, 0.464844f, -1.29492f,
+    -0.0800781f, 0.803711f, 0.879883f, -0.765625f, -0.0400391f, -0.616211f,
+    -0.170898f, 0.879883f, 0.510742f, 0.158203f, 0.381836f, -0.270508f,
+    -0.0693359f, 0.651367f, 0.431641f, 0.104492f, 0.991211f, -0.0634766f,
+    -0.0478516f, 0.750977f, 0.283203f, -0.0332031f, 1.52051f, -0.00195312f,
+    -0.201172f, 1.08984f, 0.173828f, 0.0849609f, 1.44141f, -0.214844f,
+    -0.0107422f, 1.29785f, 0.520508f, 0.00488281f, 1.73047f, -0.523438f,
+    0.136719f, 1.42188f, 0.987305f, 0.0527344f, 1.74707f, -0.525391f,
+    0.34668f, 0.469727f, 0.428711f, 0.114258f, -0.788086f, 0.177734f,
+    0.400391f, -0.106445f, 0.328125f, -0.566406f, -0.948242f, 0.670898f,
+    0.467773f, -0.21875f, 0.55957f, -0.767578f, -0.232422f, 0.195312f,
+    0.625f, -0.271484f, 0.865234f, -0.765625f, 0.299805f, 0.0703125f,
+    0.378906f, -0.526367f, 0.548828f, -0.231445f, -0.569336f, 0.455078f,
+    0.303711f, -0.866211f, -0.485352f, 0.566406f, -1.60547f, 0.481445f,
+    0.183594f, -0.782227f, -0.260742f, 0.243164f, -1.41504f, 0.373047f,
+    0.172852f, -0.935547f, -0.412109f, 0.133789f, -1.69727f, 0.178711f,
+    0.407227f, -0.952148f, -0.227539f, 0.0751953f, -1.67188f, 0.339844f,
+    0.498047f, -0.795898f, 0.209961f, 0.177734f, -1.3916f, 0.458984f,
+    0.295898f, 0.0390625f, 0.697266f, 0.258789f, -0.0703125f, -0.131836f,
+    0.56543f, 0.250977f, 0.913086f, -0.353516f, 0.90332f, 0.191406f,
+    0.708008f, 0.352539f, 0.853516f, -0.839844f, 0.955078f, 0.636719f,
+    0.657227f, 0.389648f, 0.620117f, -0.725586f, 0.43457f, 0.485352f,
+    0.424805f, 0.479492f, 0.287109f, -0.505859f, -0.209961f, 0.0927734f,
+    0.21582f, 0.709961f, 0.492188f, -0.413086f, -0.0869141f, 0.0673828f,
+    -0.119141f, 1.20508f, 0.392578f, 0.229492f, 0.927734f, -0.297852f,
+    0.142578f, 1.0293f, 0.430664f, 0.0449219f, 1.71875f, -0.0283203f,
+    0.0107422f, 1.18164f, 0.0517578f, 0.0751953f, 1.80273f, -0.0693359f,
+    -0.19043f, 1.1748f, 0.236328f, 0.0839844f, 1.78711f, -0.472656f,
+    -0.270508f, 1.10254f, 0.964844f, 0.118164f, 1.75684f, -0.901367f,
+    -0.211914f, 1.11133f, 0.65625f, 0.308594f, 0.142578f, 0.396484f,
+    0.239258f, 0.0800781f, 0.973633f, -0.824219f, -0.25293f, 0.485352f,
+    0.351562f, -0.0771484f, 1.08984f, -0.632812f, 0.240234f, -0.258789f,
+    0.436523f, -0.514648f, 0.491211f, 0.0664062f, -0.244141f, -0.148438f,
+    -0.171875f, -0.477539f, -0.459961f, 1.1084f, -0.822266f, -0.114258f,
+    -0.192383f, -0.608398f, -0.771484f, 1.11133f, -1.25488f, 1.01953f,
+    -0.0839844f, -0.620117f, -0.794922f, 0.660156f, -0.876953f, 0.0957031f,
+    -0.242188f, -0.711914f, -0.55957f, 0.736328f, -0.649414f, -0.0263672f,
+    -0.258789f, -0.498047f, -0.973633f, 0.957031f, -0.660156f, 0.186523f,
+    -0.262695f, -0.595703f, -0.787109f, 0.893555f, -0.429688f, -0.0234375f,
+    -0.254883f, -0.449219f, -0.783203f, 0.90918f, 0.106445f, -0.161133f,
+    -0.287109f, -0.0800781f, -0.729492f, 0.933594f, -0.126953f, -0.0742188f,
+    -0.550781f, -0.271484f, -0.989258f, 1.00098f, -0.879883f, 0.0234375f,
+    -0.543945f, -0.50293f, -1.18945f, 1.24023f, -1.33398f, 0.325195f,
+    -0.262695f, -0.307617f, -0.912109f, 1.39062f, -1.06055f, 0.0107422f,
+    -0.00292969f, -0.573242f, -0.4375f, 1.15625f, -0.651367f, -0.310547f,
+    0.188477f, -0.730469f, -0.121094f, 0.611328f, -0.779297f, 0.335938f,
+    0.731445f, -0.475586f, -0.00390625f, 0.100586f, -0.693359f, 0.254883f,
+    0.813477f, -0.345703f, 0.420898f, -0.400391f, -0.539062f, 0.365234f,
+    0.720703f, 0.0214844f, 0.673828f, -0.370117f, 0.0585938f, 0.499023f,
+    0.523438f, 0.198242f, 0.759766f, -0.544922f, 0.543945f, 0.226562f,
+    0.473633f, 0.34082f, 0.595703f, -0.682617f, 0.292969f, -0.217773f,
+    0.0742188f, 0.553711f, 0.762695f, -0.504883f, 0.292969f, 0.0751953f,
+    0.0126953f, 0.427734f, 0.769531f, -0.265625f, 0.552734f, -0.0175781f,
+    -0.30957f, 0.253906f, 0.322266f, 0.117188f, 0.263672f, -0.706055f,
+    -0.991211f, 0.266602f, 0.501953f, 0.00585938f, 0.0341797f, -1.24805f,
+    -1.21777f, 0.488281f, 0.461914f, 0.0986328f, 0.362305f, -1.1709f,
+    -1.17188f, 0.50293f, 0.458984f, 0.108398f, 0.460938f, -1.52148f,
+    -1.27051f, 0.379883f, 0.90625f, 0.0400391f, 0.524414f, -1.77832f,
+    -0.951172f, 0.397461f, 0.589844f, 0.520508f, 0.439453f, -1.99902f,
+    -0.643555f, 0.313477f, 0.766602f, 0.450195f, 0.286133f, -1.29883f,
+    -0.375f, 0.225586f, 0.697266f, 0.299805f, 0.108398f, -0.976562f,
+    0.09375f, 0.0361328f, 0.851562f, -0.210938f, 0.0615234f, -0.0898438f,
+    0.59082f, 0.313477f, 0.756836f, -0.731445f, 0.296875f, -0.0927734f,
+    0.552734f, 0.223633f, 0.558594f, -0.806641f, 0.00195312f, 0.03125f,
+    0.728516f, 0.276367f, 0.744141f, -0.994141f, 0.197266f, -0.425781f,
+    0.316406f, 0.046875f, 0.601562f, -0.633789f, -0.0576172f, -0.320312f,
+    0.786133f, 0.0986328f, 1.0f, -1.19922f, 0.34668f, -0.546875f,
+    0.481445f, 0.00390625f, 0.876953f, -1.04297f, -0.0507812f, -0.775391f,
+    0.333984f, -0.0175781f, 1.02539f, -1.07129f, -0.12207f, -0.212891f,
+    0.28125f, 0.00488281f, 0.998047f, -0.97168f, 0.178711f, -0.444336f,
+    0.178711f, 0.0136719f, 0.896484f, -0.9375f, 0.0117188f, -0.291992f,
+    0.132812f, 0.0234375f, 0.975586f, -0.943359f, -0.0078125f, 0.0546875f,
+    0.244141f, -0.0771484f, 1.05469f, -1.02148f, 0.313477f, -0.349609f,
+    0.148438f, 0.0839844f, 0.619141f, -0.75f, -0.589844f, -0.0488281f,
+    0.0263672f, -0.176758f, 0.697266f, -0.691406f, -0.625977f, -0.417969f,
+    0.408203f, 0.265625f, 1.01953f, -1.09863f, 0.106445f, 0.0117188f,
+    0.157227f, 0.424805f, 1.07422f, -0.816406f, 0.498047f, 0.0996094f,
+    0.00585938f, 0.53418f, 0.771484f, -0.610352f, 0.744141f, 0.0195312f,
+    0.0478516f, 0.552734f, 0.734375f, -0.72168f, 0.518555f, -0.144531f,
+    -0.0361328f, 0.513672f, 0.822266f, -0.736328f, 0.65918f, -0.179688f,
+    -0.104492f, 0.425781f, 1.00098f, -0.885742f, 0.739258f, -0.681641f,
+    -0.443359f, 0.375977f, 0.884766f, -0.724609f, 0.110352f, -0.289062f,
+    -0.414062f, 0.494141f, 0.53125f, -0.422852f, 0.216797f, -0.786133f,
+    -0.569336f, 0.749023f, 0.75293f, -0.529297f, 0.730469f, -0.911133f,
+    -0.68457f, 0.611328f, 0.959961f, -0.623047f, 1.06543f, -0.499023f,
+    -0.392578f, 0.761719f, 0.43457f, -0.357422f, 0.631836f, -0.746094f,
+    -0.370117f, 0.777344f, 0.379883f, -0.225586f, 0.677734f, -0.478516f,
+    -0.358398f, 0.788086f, 0.569336f, -0.34082f, 0.939453f, -0.238281f,
+    -0.230469f, 0.861328f, 0.448242f, -0.219727f, 0.966797f, -0.310547f,
+    -0.242188f, 0.863281f, 0.369141f, -0.0859375f, 0.87207f, -0.400391f,
+    -0.385742f, 0.841797f, 0.401367f, -0.0634766f, 0.912109f, -0.458008f,
+    0.0107422f, 0.753906f, 0.758789f, -0.675781f, 0.765625f, -0.342773f,
+    -0.123047f, 0.855469f, 0.599609f, -0.490234f, 0.963867f, -0.118164f,
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+    -0.229492f, -0.0253906f, 0.775391f, -0.611328f, -0.360352f, 0.0371094f,
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+    0.371094f, 0.255859f, 1.41797f, -1.27832f, 0.614258f, 0.764648f,
+    0.869141f, 0.426758f, 0.758789f, -1.04395f, 0.401367f, 0.263672f,
+    0.563477f, 0.450195f, 0.774414f, -0.908203f, 0.384766f, -0.262695f,
+    0.664062f, 0.509766f, 0.798828f, -0.757812f, 0.770508f, 0.491211f,
+    0.62207f, 0.487305f, 0.496094f, -0.530273f, 0.375977f, 1.18652f,
+    0.736328f, 0.386719f, 0.470703f, -0.647461f, 0.379883f, 0.47168f,
+    0.834961f, 0.289062f, 0.475586f, -0.654297f, 0.448242f, 0.395508f,
+    0.930664f, 0.0830078f, 0.157227f, -0.304688f, 0.0634766f, 1.30078f,
+    0.905273f, -0.102539f, 0.0576172f, -0.303711f, -0.334961f, 0.885742f,
+    0.709961f, -0.143555f, 0.0390625f, -0.18457f, -0.498047f, 1.1084f,
+    0.744141f, 0.0283203f, 0.383789f, -0.371094f, -0.126953f, 1.17285f,
+    0.506836f, 0.109375f, 0.680664f, -0.244141f, -0.0830078f, 0.577148f,
+    0.12793f, 0.25f, 0.972656f, -0.328125f, 0.34082f, -0.234375f,
+    -0.327148f, 0.470703f, 0.987305f, -0.535156f, 0.730469f, -0.957031f,
+    -0.509766f, 0.602539f, 0.938477f, -0.640625f, 0.836914f, -1.13672f,
+    -0.56543f, 0.450195f, 0.737305f, -0.449219f, 0.649414f, -1.08105f,
+    -0.364258f, 0.338867f, 0.667969f, -0.533203f, 0.654297f, -1.0918f,
+    -0.505859f, 0.422852f, 0.745117f, -0.443359f, 0.319336f, -0.753906f,
+    -0.563477f, 0.374023f, 0.640625f, -0.435547f, 0.220703f, -0.868164f,
+    -0.701172f, 0.317383f, 0.702148f, -0.527344f, 0.138672f, -0.848633f,
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+    0.174805f, 1.59863f, 0.0947266f, 1.1875f, 0.429688f, 0.442383f,
+    0.00976562f, 0.435547f, 0.345703f, -0.114258f, 0.238281f, -0.689453f,
+    0.30957f, 0.0732422f, 0.606445f, -0.650391f, -0.0947266f, -0.03125f,
+    0.183594f, -0.144531f, 0.746094f, -0.793945f, -0.574219f, -0.0742188f,
+    0.196289f, -0.199219f, 1.13867f, -1.11816f, -0.227539f, -0.462891f,
+    0.0517578f, -0.0341797f, 1.18945f, -1.1084f, -0.0283203f, -0.342773f,
+    0.174805f, -0.0078125f, 1.05176f, -1.03906f, 0.0253906f, -0.375977f,
+    -0.169922f, 0.00292969f, 0.837891f, -0.716797f, -0.0205078f, -0.373047f,
+    0.293945f, 0.0175781f, 0.833984f, -0.916016f, -0.0996094f, -0.149414f,
+    0.200195f, -0.00195312f, 0.865234f, -0.916016f, -0.0117188f, -0.390625f,
+    0.290039f, 0.0234375f, 0.985352f, -0.987305f, 0.0439453f, -0.214844f,
+    0.0917969f, 0.0615234f, 1.02832f, -1.00684f, 0.152344f, -0.452148f,
+    0.0615234f, -0.00585938f, 1.02148f, -0.976562f, -0.0927734f, -0.286133f,
+    0.189453f, -0.0644531f, 1.02539f, -1.02246f, 0.0166016f, -0.243164f,
+    0.109375f, -0.09375f, 0.981445f, -0.931641f, 0.0458984f, -0.460938f,
+    0.0537109f, -0.0429688f, 1.05859f, -0.850586f, 0.0771484f, -0.0507812f,
+    0.108398f, -0.177734f, 0.779297f, -0.74707f, -0.378906f, -0.413086f,
+    -0.205078f, -0.0488281f, 0.946289f, -0.760742f, -0.180664f, -0.228516f,
+    -0.208008f, -0.0615234f, 1.05371f, -0.953125f, -0.34668f, -1.16797f,
+    -0.0322266f, -0.276367f, 1.06641f, -0.863281f, -0.0244141f, -0.290039f,
+    -0.0429688f, 0.0439453f, 1.28223f, -1.06348f, 0.181641f, -0.514648f,
+    -0.0214844f, 0.0f, 0.861328f, -0.738281f, -0.0449219f, 0.0722656f,
+    0.125f, 0.193359f, 1.15039f, -1.0957f, 0.225586f, -0.137695f,
+    0.12207f, -0.0400391f, 0.732422f, -0.818359f, -0.40918f, -0.672852f,
+    -0.425781f, 0.839844f, 0.856445f, 0.198242f, -0.363281f, 0.206055f,
+    -0.214844f, 1.20215f, 0.943359f, 0.0195312f, 2.0f, 0.874023f,
+    0.0839844f, 0.827148f, 0.587891f, -0.384766f, 1.57715f, 0.108398f,
+    -0.116211f, 0.952148f, 0.246094f, -0.336914f, 0.463867f, -0.740234f,
+    0.0185547f, 0.950195f, 0.55957f, -0.442383f, 1.09668f, 0.0585938f,
+    0.132812f, 1.37695f, 2.0f, -0.59375f, 2.0f, -0.676758f,
+    -0.199219f, -0.0205078f, 0.268555f, -0.5f, -1.94629f, 1.2832f,
+    0.0078125f, -0.201172f, 0.674805f, -0.708984f, -0.490234f, -0.515625f,
+    0.0439453f, -0.0830078f, 1.14355f, -1.01953f, -0.0224609f, -0.282227f,
+    0.0214844f, -0.078125f, 1.09668f, -0.961914f, 0.0253906f, -0.56543f,
+    0.30957f, 0.964844f, 1.56836f, -0.272461f, 1.91309f, -0.53418f,
+    -0.695312f, -0.878906f, -0.0146484f, 0.277344f, -1.6416f, 0.0244141f,
+    0.0898438f, -0.785156f, 0.229492f, -0.259766f, -1.06055f, -0.241211f,
+    0.0224609f, -0.769531f, 0.748047f, -0.680664f, -0.629883f, -0.549805f,
+    -0.195312f, -0.796875f, -0.399414f, 0.0859375f, -1.99902f, 0.24707f,
+    0.208984f, 0.563477f, 1.91797f, 0.0585938f, 2.0f, -0.990234f,
+    0.327148f, -0.0917969f, 1.16797f, -0.94043f, 0.623047f, -1.1748f,
+    -0.0205078f, -0.0449219f, 0.883789f, -0.905273f, -0.370117f, -0.601562f,
+    0.0332031f, -0.0527344f, 0.928711f, -0.833984f, -0.180664f, -0.267578f,
+    0.0351562f, -0.0175781f, 0.998047f, -0.922852f, -0.000976562f, -0.371094f,
+    0.0341797f, -0.0166016f, 0.977539f, -0.900391f, -0.00292969f, -0.37207f,
+    0.0449219f, -0.0439453f, 0.989258f, -0.904297f, -0.0576172f, -0.37207f,
+    0.270508f, -0.368164f, 0.0576172f, -0.607422f, -1.95508f, -0.182617f,
+    -0.390625f, 1.62598f, 1.52734f, 1.2793f, 2.0f, -1.99902f,
+    0.226562f, 1.01465f, 0.669922f, -0.373047f, 1.71484f, 1.99707f,
+    -0.0654297f, 1.00391f, 0.330078f, -0.432617f, 0.704102f, -0.96875f,
+    0.0800781f, 0.964844f, 0.702148f, -0.5625f, 1.39746f, -0.203125f,
+    0.255859f, 1.74512f, 1.52539f, 0.417969f, 2.0f, -0.0976562f,
+    -0.482422f, 0.09375f, 0.151367f, -0.328125f, -1.88867f, -0.0595703f,
+    0.117188f, 0.0751953f, 0.870117f, -0.870117f, 0.046875f, -0.280273f,
+    0.125f, 0.124023f, 1.0791f, -0.964844f, 0.338867f, -0.0791016f,
+    0.0751953f, 0.12207f, 0.920898f, -0.888672f, 0.0273438f, -0.250977f,
+    0.00488281f, 0.165039f, 1.01074f, -0.944336f, 0.137695f, -0.387695f,
+    -0.142578f, 0.238281f, 1.77246f, -1.42285f, 0.90625f, -0.856445f,
+    0.0556641f, -0.219727f, -0.785156f, 1.47266f, -1.99902f, 1.27246f,
+    -0.132812f, -0.746094f, 0.172852f, -0.0830078f, -1.3584f, 0.638672f,
+    0.0175781f, -0.786133f, 0.754883f, -0.729492f, -0.808594f, -0.291992f,
+    0.170898f, -0.746094f, 0.623047f, -0.667969f, -0.743164f, -0.241211f,
+    0.0693359f, -0.725586f, 0.495117f, -0.545898f, -0.969727f, -0.131836f,
+    0.0234375f, -0.52832f, 0.280273f, -0.327148f, -1.0498f, -0.210938f,
+    -0.253906f, 0.234375f, 0.661133f, -0.0332031f, -0.708008f, -0.458984f,
+    0.31543f, 0.480469f, 1.59082f, -1.22266f, 1.41602f, -0.270508f,
+    0.263672f, 0.318359f, 1.21289f, -1.12207f, 0.853516f, -0.272461f,
+    0.158203f, 1.84766f, 2.0f, 0.341797f, 2.0f, -0.788086f,
+    -0.264648f, -0.326172f, -1.25977f, 0.842773f, -1.99902f, -0.947266f,
+    0.249023f, -0.642578f, 0.745117f, -0.744141f, -0.404297f, -0.266602f,
+    0.0898438f, -0.568359f, 0.501953f, -0.494141f, -0.858398f, 0.0722656f,
+    -0.543945f, 1.16895f, 1.12012f, 1.47461f, -1.12988f, -0.27832f,
+    0.53125f, 0.875f, 0.845703f, -0.318359f, 1.68555f, 1.29199f,
+    -0.00195312f, 0.861328f, 0.601562f, -0.519531f, 1.16211f, -1.05957f,
+    0.0507812f, 0.904297f, 0.625977f, -0.525391f, 1.16797f, -0.163086f,
+    0.125977f, 1.99902f, 2.0f, 2.0f, 2.0f, -0.00195312f,
+    -1.11719f, -0.3125f, -0.320312f, 0.585938f, -1.99902f, 0.647461f,
+    0.198242f, -0.538086f, 0.993164f, -0.897461f, -0.227539f, -0.354492f,
+    0.0976562f, -0.416016f, 0.623047f, -0.682617f, -0.832031f, -0.223633f,
+    -0.160156f, 0.0751953f, -0.791992f, 1.13379f, -1.99902f, -0.755859f,
+    0.669922f, 1.02637f, 1.26758f, -0.293945f, 2.0f, 1.93457f,
+    -0.0126953f, 0.773438f, 0.475586f, -0.59375f, 0.329102f, -0.588867f,
+    0.113281f, 0.740234f, 0.749023f, -0.716797f, 0.941406f, -0.0878906f,
+    0.71875f, 1.8125f, 2.0f, -0.289062f, 2.0f, -1.01074f,
+    0.0117188f, -0.183594f, -0.969727f, 0.893555f, -1.99902f, 0.333008f,
+    0.188477f, -0.643555f, 0.504883f, -0.511719f, -0.804688f, -0.957031f,
+    0.0546875f, -0.305664f, -0.0449219f, -0.145508f, -1.875f, 0.0996094f,
+    -0.155273f, 1.59668f, 1.5293f, 1.46973f, 2.0f, -1.9834f,
+    0.375f, 1.20508f, 0.736328f, -0.399414f, 2.0f, 2.0f,
+    0.123047f, 0.834961f, 1.04004f, -0.808594f, 1.31934f, -0.634766f,
+    0.548828f, 0.129883f, -1.64746f, 2.0f, -1.99902f, 0.819336f,
+    0.0273438f, -0.254883f, 0.722656f, -0.691406f, -0.464844f, -1.05566f,
+    0.0634766f, -0.206055f, 1.02148f, -0.90332f, 0.0595703f, -0.03125f,
+    0.129883f, -0.177734f, 0.697266f, -0.713867f, -0.351562f, -0.169922f,
+    -0.119141f, -0.172852f, 1.01855f, -0.989258f, -0.12793f, -0.670898f,
+    -0.146484f, -0.261719f, 1.16602f, -1.05664f, -0.302734f, -0.25293f,
+    -0.0458984f, -0.198242f, 0.90625f, -0.876953f, -0.144531f, -0.424805f,
+    -0.151367f, -0.147461f, 0.926758f, -0.835938f, -0.191406f, -0.326172f,
+    -0.128906f, -0.216797f, 0.910156f, -0.851562f, -0.291992f, -0.549805f,
+    -0.0517578f, -0.0869141f, 1.07715f, -0.977539f, -0.0361328f, -0.418945f,
+    -0.148438f, -0.133789f, 0.907227f, -0.836914f, -0.213867f, -0.768555f,
+    -0.0664062f, 0.182617f, 1.0498f, -0.915039f, 0.400391f, -0.523438f,
+    0.015625f, 0.0f, 1.13184f, -1.09961f, -0.244141f, -0.330078f,
+    -0.115234f, 0.0166016f, 0.944336f, -0.868164f, -0.430664f, -0.246094f,
+    -0.0185547f, -0.00976562f, 0.819336f, -0.822266f, -0.380859f, -1.1709f,
+    0.0605469f, -0.0498047f, 0.777344f, -0.703125f, 0.0800781f, -0.451172f,
+    0.304688f, 0.0517578f, 0.825195f, -0.771484f, 0.145508f, 0.495117f,
+    -0.0888672f, -0.243164f, 1.48145f, -1.22168f, 0.0615234f, -0.192383f,
+    -0.0537109f, 0.0195312f, 1.21582f, -1.06836f, 0.175781f, -0.394531f,
+    0.237305f, -0.0126953f, 0.800781f, -0.920898f, -0.12207f, -0.391602f,
+    -0.0917969f, -0.0791016f, 1.08008f, -1.03613f, -0.0654297f, -0.423828f,
+    0.0478516f, -0.0253906f, 0.873047f, -0.884766f, -0.0722656f, -0.579102f,
+    0.0136719f, -0.0917969f, 0.954102f, -0.922852f, -0.172852f, -0.244141f,
+    0.0f, -0.141602f, 0.929688f, -0.894531f, -0.179688f, -0.291992f,
+    0.0283203f, -0.0947266f, 0.961914f, -0.926758f, -0.135742f, -0.329102f,
+    0.0576172f, -0.0351562f, 0.999023f, -0.958984f, -0.0498047f, -0.248047f,
+    0.0869141f, -0.078125f, 1.01074f, -0.954102f, 0.00976562f, -0.217773f,
+    0.0986328f, -0.0556641f, 0.916992f, -0.914062f, -0.136719f, -0.219727f,
+    0.0488281f, -0.139648f, 0.985352f, -0.952148f, -0.152344f, -0.286133f,
+    0.0166016f, -0.0917969f, 1.0459f, -0.972656f, -0.0605469f, -0.228516f,
+    0.0507812f, -0.0810547f, 0.956055f, -0.9375f, -0.18457f, -0.275391f,
+    0.0703125f, -0.0986328f, 0.948242f, -0.928711f, -0.162109f, -0.333008f
+};
+extern const size_t kAccelerometerLaptopModeTestDataLength =
+    arraysize(kAccelerometerLaptopModeTestData);
+
+extern const float kAccelerometerFullyOpenTestData[] = {
+    0.892578f, -0.0810547f, 0.0146484f, 0.929688f, -0.0644531f, -0.0234375f,
+    0.996094f, -0.0136719f, 0.0185547f, 1.02344f, -0.0615234f, -0.0449219f,
+    0.978516f, 0.125977f, 0.0400391f, 0.996094f, 0.0332031f, -0.0117188f,
+    0.963867f, 0.107422f, 0.0214844f, 0.980469f, 0.0185547f, -0.00683594f,
+    0.952148f, 0.0361328f, 0.0253906f, 0.976562f, -0.00390625f, -0.0126953f,
+    0.97168f, 0.0205078f, 0.0517578f, 1.01074f, 0.015625f, -0.0234375f,
+    0.953125f, -0.000976562f, 0.0390625f, 0.977539f, -0.0224609f, -0.00976562f,
+    0.954102f, 0.0244141f, 0.0439453f, 0.986328f, 0.00292969f, -0.000976562f,
+    0.967773f, 0.0537109f, 0.046875f, 0.99707f, 0.0175781f, -0.000976562f,
+    0.951172f, 0.0390625f, 0.0341797f, 0.974609f, -0.00878906f, -0.000976562f,
+    0.948242f, 0.0185547f, 0.0478516f, 0.976562f, -0.000976562f, -0.00683594f,
+    0.958984f, 0.0263672f, 0.078125f, 0.982422f, -0.0205078f, 0.0283203f,
+    0.930664f, 0.00878906f, 0.0664062f, 0.970703f, 0.00390625f, -0.0078125f,
+    0.945312f, 0.0380859f, -0.00585938f, 0.972656f, 0.0419922f, -0.0478516f,
+    1.01953f, 0.240234f, -0.182617f, 1.00977f, 0.18457f, -0.126953f,
+    1.05566f, 0.0751953f, -0.0888672f, 1.09766f, 0.0732422f, -0.0898438f,
+    1.21484f, 0.119141f, -0.000976562f, 1.23633f, 0.194336f, -0.447266f,
+    1.31445f, 0.213867f, -0.118164f, 1.30762f, 0.0908203f, -0.260742f,
+    0.860352f, 0.141602f, -0.166016f, 0.868164f, 0.0429688f, -0.258789f,
+    0.727539f, 0.0419922f, -0.21875f, 0.740234f, 0.0126953f, -0.162109f,
+    0.652344f, -0.00292969f, -0.185547f, 0.666992f, 0.0800781f, -0.272461f,
+    0.852539f, -0.0478516f, -0.228516f, 0.819336f, -0.0996094f, -0.180664f,
+    0.959961f, -0.0537109f, -0.240234f, 0.935547f, -0.0917969f, -0.269531f,
+    0.988281f, -0.0507812f, -0.197266f, 0.981445f, -0.0712891f, -0.323242f,
+    0.964844f, -0.0683594f, -0.203125f, 0.941406f, -0.0898438f, -0.236328f,
+    0.942383f, -0.0429688f, -0.206055f, 0.921875f, -0.0527344f, -0.239258f,
+    0.976562f, -0.0742188f, -0.261719f, 0.958008f, -0.09375f, -0.311523f,
+    0.949219f, -0.0839844f, -0.242188f, 0.949219f, -0.0742188f, -0.323242f,
+    0.973633f, -0.0263672f, -0.238281f, 0.958984f, -0.0488281f, -0.293945f,
+    0.931641f, -0.0214844f, -0.225586f, 0.931641f, 0.0195312f, -0.225586f,
+    0.810547f, -0.0947266f, -0.15332f, 0.947266f, 0.241211f, -0.100586f,
+    0.326172f, 0.286133f, -0.12207f, 0.855469f, 0.677734f, -0.228516f,
+    0.229492f, 1.08398f, 0.0224609f, 0.822266f, 0.759766f, -0.0722656f,
+    0.294922f, 1.42676f, 0.147461f, 0.239258f, 0.755859f, 0.142578f,
+    -0.120117f, 1.00977f, -0.0722656f, -0.154297f, 0.832031f, -0.0576172f,
+    -0.15332f, 1.10156f, -0.0273438f, -0.119141f, 1.05078f, 0.0166016f,
+    -0.0927734f, 1.09961f, -0.0703125f, -0.0751953f, 1.04688f, -0.00195312f,
+    -0.078125f, 0.897461f, -0.0625f, -0.078125f, 0.854492f, -0.0947266f,
+    -0.123047f, 0.811523f, -0.0488281f, -0.113281f, 0.796875f, 0.0f,
+    -0.0488281f, 0.961914f, -0.177734f, -0.0898438f, 0.859375f, -0.172852f,
+    0.0126953f, 1.1084f, -0.158203f, 0.0292969f, 1.0791f, -0.152344f,
+    0.154297f, 1.29492f, -0.126953f, 0.134766f, 1.23145f, -0.0878906f,
+    -0.200195f, 0.667969f, -0.216797f, -0.0888672f, 0.935547f, -0.143555f,
+    0.000976562f, 1.13281f, -0.0498047f, 0.00195312f, 1.05469f, -0.231445f,
+    0.0927734f, 0.956055f, -0.292969f, 0.0625f, 0.927734f, -0.112305f,
+    0.0585938f, 0.975586f, -0.163086f, 0.0957031f, 1.03418f, -0.229492f,
+    0.000976562f, 0.985352f, -0.09375f, -0.00585938f, 0.945312f, -0.140625f,
+    -0.0302734f, 0.998047f, -0.208008f, -0.0507812f, 0.916016f, -0.112305f,
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+    -0.791016f, 0.00390625f, -0.277344f, 0.0136719f, -0.492188f, -0.779297f,
+    -1.49316f, 0.0957031f, -0.179688f, -0.587891f, 0.665039f, 0.398438f,
+    -0.980469f, 0.428711f, 0.254883f, -0.828125f, 0.724609f, 0.663086f,
+    -0.90625f, 0.555664f, 0.0791016f, -0.837891f, 0.591797f, 0.257812f,
+    -0.806641f, 0.609375f, 0.0458984f, -0.779297f, 0.529297f, 0.00292969f,
+    -0.829102f, 0.640625f, 0.0371094f, -0.797852f, 0.583008f, 0.208984f,
+    -0.864258f, 0.583984f, -0.0615234f, -0.758789f, 0.72168f, 0.0947266f,
+    -0.921875f, 0.605469f, -0.264648f, -0.75293f, 0.701172f, 0.107422f,
+    -0.735352f, 0.44043f, -0.527344f, -0.398438f, 0.46875f, -0.421875f,
+    -0.424805f, 0.0810547f, -0.754883f, -0.241211f, -0.107422f, -1.13574f,
+    -0.410156f, -0.0400391f, -0.942383f, -0.454102f, -0.12207f, -1.24902f,
+    -0.509766f, -0.393555f, -0.959961f, -0.511719f, -0.381836f, -1.04883f,
+    -0.924805f, -0.756836f, -1.17969f, -0.521484f, -0.105469f, -1.16504f,
+    -0.767578f, -0.477539f, -0.401367f, -0.0341797f, -0.341797f, 0.0507812f,
+    0.389648f, -0.507812f, 0.186523f, 0.438477f, -1.33594f, 0.625977f,
+    0.518555f, -0.671875f, 0.182617f, 0.432617f, -1.18359f, 0.132812f,
+    0.414062f, -0.782227f, 0.0615234f, 0.401367f, -1.30176f, -0.0683594f,
+    -0.100586f, -0.586914f, 0.0302734f, 0.191406f, -0.983398f, -0.0273438f,
+    -0.735352f, -0.224609f, -0.342773f, -0.241211f, -0.566406f, 0.015625f,
+    -1.1084f, -0.00976562f, -0.652344f, -0.75293f, 0.239258f, -0.449219f,
+    -1.08789f, 0.107422f, -0.572266f, -0.887695f, 0.407227f, -0.423828f,
+    -0.919922f, 0.173828f, -0.705078f, -0.825195f, 0.411133f, -0.484375f,
+    -0.799805f, 0.237305f, -0.776367f, -0.745117f, 0.459961f, -0.819336f,
+    -0.749023f, 0.208008f, -0.788086f, -0.716797f, 0.226562f, -0.795898f,
+    -0.72168f, 0.123047f, -0.790039f, -0.705078f, 0.101562f, -0.720703f,
+    -0.745117f, -0.0517578f, -0.771484f, -0.701172f, -0.0175781f, -0.758789f,
+    -0.765625f, -0.0917969f, -0.745117f, -0.751953f, -0.149414f, -0.6875f,
+    -0.660156f, -0.0166016f, -0.782227f, -0.592773f, -0.0205078f, -0.726562f,
+    -0.376953f, 0.119141f, -0.599609f, -0.371094f, 0.0107422f, -0.736328f,
+    -0.325195f, 0.0771484f, -0.768555f, -0.388672f, -0.0273438f, -0.750977f,
+    -0.477539f, 0.107422f, -0.919922f, -0.514648f, 0.125f, -0.961914f,
+    -0.37793f, 0.0136719f, -0.981445f, -0.447266f, -0.0107422f, -0.823242f,
+    -0.303711f, 0.0986328f, -1.00684f, -0.366211f, 0.0986328f, -1.14551f,
+    -0.239258f, 0.140625f, -0.894531f, -0.297852f, 0.0849609f, -0.949219f,
+    -0.341797f, 0.131836f, -0.966797f, -0.380859f, 0.0947266f, -0.75293f,
+    -0.391602f, 0.0839844f, -0.908203f, -0.40625f, 0.161133f, -0.860352f,
+    -0.452148f, 0.1875f, -0.950195f, -0.496094f, 0.200195f, -0.828125f,
+    -0.581055f, 0.0771484f, -0.93457f, -0.607422f, 0.0996094f, -0.863281f,
+    -0.59375f, 0.0927734f, -0.802734f, -0.604492f, 0.0947266f, -0.807617f,
+    -0.722656f, 0.101562f, -0.844727f, -0.711914f, 0.149414f, -1.03125f,
+    -0.77832f, 0.125977f, -0.78418f, -0.740234f, 0.121094f, -0.891602f,
+    -0.808594f, 0.164062f, -0.650391f, -0.80957f, 0.0888672f, -0.416992f,
+    -0.866211f, 0.155273f, -0.382812f, -0.880859f, 0.0849609f, -0.264648f,
+    -0.775391f, 0.229492f, -0.389648f, -0.814453f, 0.0664062f, -0.226562f,
+    -0.625f, 0.414062f, -0.274414f, -0.681641f, 0.0292969f, -0.0478516f,
+    -0.711914f, 0.794922f, -0.388672f, -0.584961f, 0.368164f, -0.257812f,
+    -0.545898f, 1.09277f, -0.277344f, -0.125977f, 0.822266f, -0.365234f,
+    -0.467773f, 0.714844f, -0.413086f, -0.136719f, 1.57227f, -0.0947266f,
+    -0.223633f, 0.817383f, -0.0556641f, -0.0322266f, 1.18945f, -0.191406f,
+    -0.498047f, 0.991211f, -0.231445f, -0.246094f, 0.8125f, -0.239258f,
+    -0.755859f, 0.853516f, -0.228516f, -0.821289f, 0.503906f, -0.121094f,
+    -0.795898f, 0.523438f, -0.220703f, -0.773438f, 0.517578f, -0.274414f,
+    -0.757812f, 0.539062f, -0.222656f, -0.770508f, 0.396484f, -0.115234f,
+    -1.2334f, 0.485352f, -0.217773f, -0.94043f, 1.01758f, -0.202148f,
+    -0.605469f, 0.0546875f, 0.0957031f, -0.639648f, -0.661133f, 0.245117f,
+    -0.750977f, 0.0615234f, -0.726562f, -0.879883f, -0.432617f, -1.05859f,
+    -1.29688f, 0.00488281f, 0.193359f, -0.939453f, 0.209961f, -0.209961f,
+    -0.793945f, 0.251953f, 0.722656f, -0.447266f, 0.0615234f, 0.855469f,
+    -0.454102f, -0.0126953f, 0.0527344f, -0.342773f, 0.154297f, 1.3877f,
+    -0.65918f, 0.133789f, 0.0576172f, -0.233398f, -0.12207f, 0.46582f,
+    -1.09961f, 0.438477f, -0.641602f, -0.861328f, 0.197266f, -1.99902f,
+    -0.932617f, 0.234375f, 0.389648f, -0.792969f, -0.0908203f, 1.66797f,
+    -1.0459f, 0.0107422f, -0.543945f, -0.80957f, 0.206055f, -0.27832f,
+    -0.915039f, 0.104492f, -0.301758f, -0.891602f, 0.0556641f, -0.681641f,
+    -0.901367f, 0.0498047f, -0.461914f, -0.927734f, -0.0390625f, -0.229492f,
+    -1.04004f, 0.0869141f, -0.435547f, -1.02148f, 0.0947266f, -0.527344f,
+    -0.979492f, 0.0751953f, 0.266602f, -0.786133f, -0.0224609f, -0.0947266f,
+    -0.702148f, -0.00683594f, -0.316406f, -0.698242f, -0.317383f, 1.92578f,
+    -1.0498f, 0.0273438f, -1.14258f, -0.226562f, 0.233398f, -0.995117f,
+    -0.9375f, 0.0146484f, -0.223633f, -0.49707f, -0.0078125f, -1.95703f,
+    -0.847656f, 0.157227f, 0.129883f, -0.459961f, -0.114258f, 2.0f,
+    -1.13574f, -0.0839844f, -0.0878906f, -0.783203f, 0.131836f, -0.803711f,
+    -0.90332f, 0.208984f, -0.365234f, -0.97168f, -0.0322266f, 0.186523f,
+    -0.924805f, 0.00292969f, -0.272461f, -0.890625f, 0.015625f, -0.333008f,
+    -0.932617f, 0.180664f, -0.459961f, -0.90918f, 0.240234f, -0.625977f,
+    -1.1582f, 0.0996094f, -0.170898f, -1.08887f, -0.00976562f, -0.849609f,
+    -0.430664f, 0.139648f, -0.308594f, -0.572266f, -0.722656f, 1.83496f,
+    -1.00977f, 0.387695f, 0.487305f, -0.268555f, 0.0712891f, -0.0136719f,
+    -1.5332f, 0.290039f, -0.0351562f, -0.861328f, 1.98535f, -1.16602f,
+    -0.602539f, 0.441406f, 0.175781f, -0.605469f, -0.831055f, 0.686523f,
+    -0.984375f, 0.494141f, -0.489258f, -0.895508f, 0.371094f, -0.665039f,
+    -1.14258f, -0.214844f, -0.140625f, -1.06348f, -0.0996094f, 0.255859f,
+    -0.874023f, 0.193359f, -0.0947266f, -0.959961f, -0.0966797f, 0.00195312f,
+    -0.996094f, -0.0117188f, -0.174805f, -0.962891f, 0.106445f, -0.162109f,
+    -1.04297f, -0.0283203f, -0.306641f, -1.06738f, -0.0224609f, -0.129883f,
+    -1.03223f, 0.129883f, 0.195312f, -1.08789f, -0.130859f, 0.649414f,
+    -0.572266f, -0.0136719f, -0.793945f, -0.382812f, 0.0f, -1.08301f,
+    -0.78125f, -0.0224609f, -0.339844f, -0.629883f, -0.0947266f, -1.83789f,
+    -1.01562f, 0.046875f, 0.223633f, -0.808594f, 0.0957031f, 1.09766f,
+    -0.756836f, -0.0488281f, 0.157227f, -0.59082f, -0.103516f, 0.929688f,
+    -0.816406f, -0.0322266f, -0.426758f, -0.868164f, -0.209961f, -1.99902f,
+    -0.986328f, -0.00878906f, -0.365234f, -0.980469f, 0.0439453f, 0.59375f,
+    -0.994141f, 0.0253906f, 0.0371094f, -0.970703f, -0.0273438f, -0.120117f,
+    -0.935547f, 0.00195312f, -0.235352f, -0.952148f, -0.0263672f, -0.194336f,
+    -0.917969f, -0.0195312f, -0.261719f, -0.928711f, -0.0234375f, -0.219727f,
+    -0.945312f, 0.0107422f, -0.228516f, -0.938477f, 0.00683594f, -0.178711f,
+    -0.791016f, 0.03125f, -0.255859f, -0.789062f, 0.0f, -0.141602f,
+    -0.789062f, 0.232422f, -0.285156f, -0.788086f, 0.228516f, -0.28125f,
+    -1.0f, 0.258789f, -0.277344f, -0.999023f, 0.28125f, -0.25293f,
+    -1.06152f, 0.046875f, -0.421875f, -1.07715f, 0.0390625f, -0.224609f,
+    -0.923828f, -0.0205078f, -0.335938f, -0.984375f, -0.0966797f, -0.34668f,
+    -0.990234f, -0.191406f, -0.301758f, -1.03613f, -0.241211f, -0.37207f,
+    -0.975586f, -0.267578f, -0.460938f, -1.00977f, -0.320312f, -0.382812f,
+    -0.913086f, -0.257812f, -0.457031f, -0.925781f, -0.256836f, -0.34668f,
+    -0.889648f, -0.237305f, -0.393555f, -0.897461f, -0.239258f, -0.429688f,
+    -0.844727f, -0.21875f, -0.428711f, -0.87207f, -0.203125f, -0.368164f,
+    -0.84668f, -0.101562f, -0.423828f, -0.875977f, -0.165039f, -0.363281f,
+    -0.884766f, -0.0625f, -0.473633f, -0.90332f, -0.078125f, -0.138672f,
+    -0.918945f, -0.198242f, -0.25f, -0.928711f, -0.138672f, -0.267578f,
+    -1.08203f, 0.00488281f, -0.575195f, -1.125f, -0.0332031f, -0.4375f,
+    -0.924805f, 0.078125f, -0.305664f, -0.93457f, -0.0166016f, -0.475586f,
+    -0.94043f, -0.00488281f, -0.533203f, -0.956055f, 0.00292969f, -0.391602f,
+    -1.00293f, 0.0361328f, -0.711914f, -1.0166f, 0.0332031f, -0.448242f,
+    -0.806641f, -0.21582f, -0.556641f, -0.759766f, -0.0214844f, -0.626953f,
+    -0.700195f, -0.263672f, -0.308594f, -0.608398f, -0.236328f, -0.253906f,
+    -0.616211f, -0.378906f, 0.224609f, -0.498047f, -0.399414f, 0.206055f,
+    -0.516602f, -0.228516f, 0.743164f, -0.174805f, -0.125f, 0.760742f,
+    -0.0214844f, -0.135742f, 0.966797f, 0.240234f, 0.0332031f, 1.01855f,
+    0.105469f, 0.15332f, 0.950195f, 0.240234f, 0.0732422f, 1.16895f,
+    0.245117f, 0.206055f, 0.952148f, 0.273438f, -0.0390625f, 1.2793f,
+    0.404297f, 0.303711f, 0.720703f, 0.369141f, 0.0966797f, 0.918945f,
+    0.329102f, 0.0390625f, 0.991211f, 0.397461f, -0.124023f, 0.866211f,
+    0.210938f, 0.130859f, 1.08789f, 0.317383f, 0.0537109f, 0.858398f,
+    0.245117f, 0.0732422f, 0.741211f, 0.419922f, 0.0302734f, 0.681641f,
+    0.485352f, -0.0214844f, 0.641602f, 0.520508f, -0.129883f, 0.839844f,
+    0.490234f, 0.00390625f, 0.676758f, 0.581055f, -0.0146484f, 0.692383f,
+    0.432617f, -0.0371094f, 0.807617f, 0.664062f, 0.255859f, 0.216797f,
+    1.22559f, 0.0195312f, 1.22168f, 1.2793f, -0.405273f, 1.72559f,
+    0.708984f, -0.209961f, 0.579102f, 0.821289f, 0.0380859f, 0.605469f,
+    0.80957f, 0.147461f, 0.419922f, 0.869141f, 0.0390625f, 0.5625f,
+    0.786133f, 0.0654297f, 0.594727f, 0.879883f, 0.0166016f, 0.480469f,
+    0.835938f, 0.00195312f, 0.414062f, 0.899414f, -0.03125f, 0.344727f,
+    0.889648f, 0.0185547f, 0.236328f, 0.932617f, -0.00585938f, 0.255859f,
+    0.910156f, 0.0898438f, 0.262695f, 0.945312f, 0.0126953f, 0.279297f,
+    0.860352f, 0.0507812f, 0.322266f, 0.913086f, 0.00195312f, 0.296875f,
+    0.875977f, 0.0078125f, 0.373047f, 0.922852f, -0.0244141f, 0.267578f,
+    0.884766f, 0.0117188f, 0.347656f, 0.926758f, -0.0371094f, 0.266602f,
+    0.894531f, -0.00683594f, 0.345703f, 0.926758f, -0.0478516f, 0.269531f,
+    0.887695f, 0.0146484f, 0.360352f, 0.927734f, -0.03125f, 0.272461f
+};
+extern const size_t kAccelerometerFullyOpenTestDataLength =
+    arraysize(kAccelerometerFullyOpenTestData);
+
+}  // namespace ash
diff --git a/ash/wm/maximize_mode/maximize_mode_controller.cc b/ash/wm/maximize_mode/maximize_mode_controller.cc
index 47ae3c8..d9e6f60 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller.cc
+++ b/ash/wm/maximize_mode/maximize_mode_controller.cc
@@ -25,7 +25,7 @@ const float kExitMaximizeModeAngle = 160.0f;
 // occasionally appear as though the lid is almost closed. If the lid appears
 // near closed but the device is on we assume it is an erroneous reading from
 // it being open 360 degrees.
-const float kFullyOpenAngleErrorTolerance = 10.0f;
+const float kFullyOpenAngleErrorTolerance = 20.0f;
 
 // When the device approaches vertical orientation (i.e. portrait orientation)
 // the accelerometers for the base and lid approach the same values (i.e.
@@ -35,6 +35,16 @@ const float kFullyOpenAngleErrorTolerance = 10.0f;
 // angle.
 const float kHingeAxisAlignedThreshold = 15.0f;
 
+// The maximum deviation from the acceleration expected due to gravity under
+// which to detect hinge angle and screen rotation.
+const float kDeviationFromGravityThreshold = 0.1f;
+
+// The maximum deviation between the magnitude of the two accelerometers under
+// which to detect hinge angle and screen rotation. These accelerometers are
+// attached to the same physical device and so should be under the same
+// acceleration.
+const float kNoisyMagnitudeDeviation = 0.1f;
+
 // The angle which the screen has to be rotated past before the display will
 // rotate to match it (i.e. 45.0f is no stickiness).
 const float kDisplayRotationStickyAngleDegrees = 60.0f;
@@ -82,6 +92,17 @@ MaximizeModeController::~MaximizeModeController() {
 void MaximizeModeController::OnAccelerometerUpdated(
     const gfx::Vector3dF& base,
     const gfx::Vector3dF& lid) {
+  // Ignore the reading if it appears unstable. The reading is considered
+  // unstable if it deviates too much from gravity and/or the magnitude of the
+  // reading from the lid differs too much from the reading from the base.
+  float base_magnitude = base.Length();
+  float lid_magnitude = lid.Length();
+  if (std::abs(base_magnitude - lid_magnitude) > kNoisyMagnitudeDeviation ||
+      std::abs(base_magnitude - 1.0f) > kDeviationFromGravityThreshold ||
+      std::abs(lid_magnitude - 1.0f) > kDeviationFromGravityThreshold) {
+      return;
+  }
+
   // Responding to the hinge rotation can change the maximize mode state which
   // affects screen rotation, so we handle hinge rotation first.
   HandleHingeRotation(base, lid);
diff --git a/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc b/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
index 0348be3..b1f0047 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
+++ b/ash/wm/maximize_mode/maximize_mode_controller_unittest.cc
@@ -54,6 +54,20 @@ void EventCounter::OnEvent(ui::Event* event) {
 
 }  // namespace
 
+// Test accelerometer data taken with the lid at less than 180 degrees while
+// shaking the device around. The data is to be interpreted in groups of 6 where
+// each 6 values corresponds to the X, Y, and Z readings from the base and lid
+// accelerometers in this order.
+extern const float kAccelerometerLaptopModeTestData[];
+extern const size_t kAccelerometerLaptopModeTestDataLength;
+
+// Test accelerometer data taken with the lid open 360 degrees while
+// shaking the device around. The data is to be interpreted in groups of 6 where
+// each 6 values corresponds to the X, Y, and Z readings from the base and lid
+// accelerometers in this order.
+extern const float kAccelerometerFullyOpenTestData[];
+extern const size_t kAccelerometerFullyOpenTestDataLength;
+
 class MaximizeModeControllerTest : public test::AshTestBase {
  public:
   MaximizeModeControllerTest() {}
@@ -249,20 +263,20 @@ TEST_F(MaximizeModeControllerTest, RotationSticky) {
 // return to the standard orientation on exiting maximize mode.
 TEST_F(MaximizeModeControllerTest, RotationOnlyInMaximizeMode) {
   // Rotate on side with lid only open 90 degrees.
-  TriggerAccelerometerUpdate(gfx::Vector3dF(0.0f, 0.8f, 0.3f),
-                             gfx::Vector3dF(-0.3f, 0.8f, 0.0f));
+  TriggerAccelerometerUpdate(gfx::Vector3dF(0.0f, 0.95f, 0.35f),
+                             gfx::Vector3dF(-0.35f, 0.95f, 0.0f));
   ASSERT_FALSE(IsMaximizeModeStarted());
   EXPECT_EQ(gfx::Display::ROTATE_0, GetInternalDisplayRotation());
 
   // Open lid, screen should now rotate to match orientation.
-  TriggerAccelerometerUpdate(gfx::Vector3dF(0.0f, 0.8f, -0.3f),
-                             gfx::Vector3dF(-0.3f, 0.8f, 0.0f));
+  TriggerAccelerometerUpdate(gfx::Vector3dF(0.0f, 0.95f, -0.35f),
+                             gfx::Vector3dF(-0.35f, 0.95f, 0.0f));
   ASSERT_TRUE(IsMaximizeModeStarted());
   EXPECT_EQ(gfx::Display::ROTATE_90, GetInternalDisplayRotation());
 
   // Close lid back to 90, screen should rotate back.
-  TriggerAccelerometerUpdate(gfx::Vector3dF(0.0f, 0.8f, 0.3f),
-                             gfx::Vector3dF(-0.3f, 0.8f, 0.0f));
+  TriggerAccelerometerUpdate(gfx::Vector3dF(0.0f, 0.95f, 0.35f),
+                             gfx::Vector3dF(-0.35f, 0.95f, 0.0f));
   ASSERT_FALSE(IsMaximizeModeStarted());
   EXPECT_EQ(gfx::Display::ROTATE_0, GetInternalDisplayRotation());
 }
@@ -313,4 +327,47 @@ TEST_F(MaximizeModeControllerTest, BlocksKeyboard) {
   counter.reset();
 }
 
+TEST_F(MaximizeModeControllerTest, LaptopTest) {
+  // Feeds in sample accelerometer data and verifies that there are no
+  // transitions into touchview / maximize mode while shaking the device around
+  // with the hinge at less than 180 degrees.
+  ASSERT_TRUE(kAccelerometerLaptopModeTestDataLength % 6 == 0);
+  for (size_t i = 0; i < kAccelerometerLaptopModeTestDataLength / 6; ++i) {
+    gfx::Vector3dF base(kAccelerometerLaptopModeTestData[i * 6],
+                        kAccelerometerLaptopModeTestData[i * 6 + 1],
+                        kAccelerometerLaptopModeTestData[i * 6 + 2]);
+    gfx::Vector3dF lid(kAccelerometerLaptopModeTestData[i * 6 + 3],
+                       kAccelerometerLaptopModeTestData[i * 6 + 4],
+                       kAccelerometerLaptopModeTestData[i * 6 + 5]);
+    TriggerAccelerometerUpdate(base, lid);
+    // There are a lot of samples, so ASSERT rather than EXPECT to only generate
+    // one failure rather than potentially hundreds.
+    ASSERT_FALSE(IsMaximizeModeStarted());
+  }
+}
+
+TEST_F(MaximizeModeControllerTest, MaximizeModeTest) {
+  // Trigger maximize mode by opening to 270 to begin the test in maximize mode.
+  TriggerAccelerometerUpdate(gfx::Vector3dF(0.0f, 0.0f, -1.0f),
+                             gfx::Vector3dF(-1.0f, 0.0f, 0.0f));
+  ASSERT_TRUE(IsMaximizeModeStarted());
+
+  // Feeds in sample accelerometer data and verifies that there are no
+  // transitions out of touchview / maximize mode while shaking the device
+  // around.
+  ASSERT_TRUE(kAccelerometerFullyOpenTestDataLength % 6 == 0);
+  for (size_t i = 0; i < kAccelerometerFullyOpenTestDataLength / 6; ++i) {
+    gfx::Vector3dF base(kAccelerometerFullyOpenTestData[i * 6],
+                        kAccelerometerFullyOpenTestData[i * 6 + 1],
+                        kAccelerometerFullyOpenTestData[i * 6 + 2]);
+    gfx::Vector3dF lid(kAccelerometerFullyOpenTestData[i * 6 + 3],
+                       kAccelerometerFullyOpenTestData[i * 6 + 4],
+                       kAccelerometerFullyOpenTestData[i * 6 + 5]);
+    TriggerAccelerometerUpdate(base, lid);
+    // There are a lot of samples, so ASSERT rather than EXPECT to only generate
+    // one failure rather than potentially hundreds.
+    ASSERT_TRUE(IsMaximizeModeStarted());
+  }
+}
+
 }  // namespace ash