Use centered app list position whenever virtual keyboard is allowed.

ash/wm/maximize_mode/maximize_mode_controller.cc

 // 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 "ash/wm/maximize_mode/maximize_mode_controller.h"
 
 #include "ash/accelerometer/accelerometer_controller.h"
+#include "ash/ash_switches.h"
 #include "ash/display/display_manager.h"
 #include "ash/shell.h"
 #include "ash/wm/maximize_mode/maximize_mode_event_blocker.h"
+#include "base/command_line.h"
 #include "ui/gfx/vector3d_f.h"
 
 namespace ash {
 
 namespace {
 
 // The hinge angle at which to enter maximize mode.
 const float kEnterMaximizeModeAngle = 200.0f;
 
 // The angle at which to exit maximize mode, this is specifically less than the
@@ skipping 54 matching lines @@
   // shortest angle between |base| and |other| was counterclockwise with respect
   // to the surface represented by |normal| and this angle must be reversed.
   if (gfx::DotProduct(cross, normal) > 0.0f)
     angle = 360.0f - angle;
   return angle;
 }
 
 }  // namespace
 
 MaximizeModeController::MaximizeModeController()
-    : rotation_locked_(false) {
+    : rotation_locked_(false),
+      have_seen_accelerometer_data_(false) {
   Shell::GetInstance()->accelerometer_controller()->AddObserver(this);
 }
 
 MaximizeModeController::~MaximizeModeController() {
   Shell::GetInstance()->accelerometer_controller()->RemoveObserver(this);
 }
 
+bool MaximizeModeController::CanEnterMaximizeMode() {
+  // If we have ever seen accelerometer data, then HandleHingeRotation may
+  // trigger maximize mode at some point in the future.
+  // The --enable-touch-view-testing switch can also mean that we may enter
+  // maximize mode.
+  return have_seen_accelerometer_data_ ||
+         CommandLine::ForCurrentProcess()->HasSwitch(
+             switches::kAshEnableTouchViewTesting);
+}
+
 void MaximizeModeController::OnAccelerometerUpdated(
     const gfx::Vector3dF& base,
     const gfx::Vector3dF& lid) {
+  have_seen_accelerometer_data_ = true;
+
   // 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;
   }
@@ skipping 127 matching lines @@
       GetDisplayInfo(gfx::Display::InternalDisplayId()).rotation();
   if (!rotation_locked_ && current_rotation != gfx::Display::ROTATE_0) {
     display_manager->SetDisplayRotation(gfx::Display::InternalDisplayId(),
                                         gfx::Display::ROTATE_0);
   }
   Shell::GetInstance()->EnableMaximizeModeWindowManager(false);
   event_blocker_.reset();
 }
 
 }  // namespace ash