Lock rotation when screen is manually rotated.

ui/display/types/display_constants.h

 // 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.
 
 #ifndef UI_DISPLAY_TYPES_DISPLAY_CONSTANTS_H_
 #define UI_DISPLAY_TYPES_DISPLAY_CONSTANTS_H_
 
 namespace ui {
 
 // Used to describe the state of a multi-display configuration.
@@ skipping 29 matching lines @@
 // Color calibration profiles. Don't change the order, and edit
 // tools/metrics/histograms/histograms.xml when a new item is added.
 enum ColorCalibrationProfile {
   COLOR_PROFILE_STANDARD,
   COLOR_PROFILE_DYNAMIC,
   COLOR_PROFILE_MOVIE,
   COLOR_PROFILE_READING,
   NUM_COLOR_PROFILES,
 };
 
+// Define the cause of a rotation being applied to a display. Users can specify
+// rotations via "ctrl+shift+F3" or via the display settings. While Maximize
+// Mode is enabled the accelerometer will apply changes to the display
+// rotation.
+enum RotationSource {
+  USER,

[flackr, 2014/05/16 16:00:22]

We tend to have enum values which make it obvious what the enum is, like
ROTATION_SOURCE_USER

[jonross, 2014/05/20 15:24:30]

Done.

+  ACCELEROMETER,
+};

[oshima, 2014/05/17 03:23:30]

I'd like to avoid having this info in ui/display. Let me think about it over
weekends.

[jonross, 2014/05/20 15:24:30]

Will update the location once this has been decided upon.

+
 }  // namespace ui
 
 #endif  // UI_DISPLAY_TYPES_DISPLAY_CONSTANTS_H_