Storage manager: Add conditional messages for disk low situation and update design.

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <!-- Idle logout dialog for retail mode -->
   <message name="IDS_IDLE_LOGOUT_TITLE" desc="Dialog title for the idle logout dialog. Used in retail mode only.">
     Are you still there?
   </message>
@@ skipping 2057 matching lines @@
   <message name="IDS_OPTIONS_DEVICE_GROUP_DESCRIPTION">
     Change settings specific to your device and peripherals.
   </message>
   <message name="IDS_OPTIONS_DEVICE_GROUP_KEYBOARD_SECTION">
     Keyboard:
   </message>
   <message name="IDS_OPTIONS_DEVICE_GROUP_KEYBOARD_SETTINGS_BUTTON_TITLE">
     Keyboard settings
   </message>
   <message name="IDS_OPTIONS_DEVICE_GROUP_STORAGE_MANAGER_BUTTON_TITLE">
-    Storage
+    Storage management
   </message>
   <message name="IDS_OPTIONS_DEVICE_GROUP_POINTER_SECTION">
     Pointer speed:
   </message>
   <message name="IDS_OPTIONS_SETTINGS_MOUSE_SPEED_DESCRIPTION">
     Mouse speed:
   </message>
   <message name="IDS_OPTIONS_SETTINGS_TOUCHPAD_SPEED_DESCRIPTION">
     Touchpad speed:
   </message>
@@ skipping 456 matching lines @@
   <message name="IDS_OPTIONS_SETTINGS_ENABLE_DATA_ROAMING" desc="Appears in the Mobile Data drop-down menu in the Internet Connections section of the Settings tab.">
     Allow mobile data roaming
   </message>
   <message name="IDS_OPTIONS_SETTINGS_TOGGLE_DATA_ROAMING_RESTRICTION" desc="Tooltip for the 'enable data roaming' entry in the Mobile Data drop-down menu indicating why the command is disabled.">
     This setting may only be modified by the owner.
   </message>
   <message name="IDS_OPTIONS_SETTINGS_DISABLE_DATA_ROAMING" desc="Appears in the Mobile Data drop-down menu in the Internet Connections section of the Settings tab.">
     Disable mobile data roaming
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_MANAGER_TAB_TITLE" desc="Title for the storage manager tab.">
-    Storage
+    Storage management
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_STORAGE_SPACE_LOW_MESSAGE_TITLE" desc="Title of a warning message indicating device's available disk space is low.">
+    Device is low on space
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_STORAGE_SPACE_LOW_MESSAGE_LINE_1" desc="The first paragraph of a warning message indicating device's available disk space is low.">
+    To free up space, delete files from device storage.
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_STORAGE_SPACE_LOW_MESSAGE_LINE_2" desc="The second paragraph of a warning message indicating device's available disk space is low.">
+    If space isn't made available, users and data may be automatically deleted.
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_STORAGE_SPACE_CRITICALLY_LOW_MESSAGE_TITLE" desc="Title of a warning message indicating device's available disk space is critically low.">
+    Device space criticaly low
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_STORAGE_SPACE_CRITICALLY_LOW_MESSAGE_LINE_1" desc="The first paragraph of a warning message indicating device's available disk space is critically low.">
+    Free up at least 512 MB of space or your device will become unresponsible. To free up space, delete files from device storage.
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_STORAGE_SPACE_CRITICALLY_LOW_MESSAGE_LINE_2" desc="The second paragraph of a warning message indicating device's available disk space is critically low.">
+    Users and data may be automatically removed until at least 512 MB of space is available.
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_CLEAR_DRIVE_CACHE_TAB_TITLE" desc="Title for the storage manager confirmation dialog tab to remove Google Drive offline files.">
     Offline files
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_CLEAR_DRIVE_CACHE_DESCRIPTION" desc="Description in the storage manager confirmation dialog to remove Google Drive offline files.">
     You can free up space by deleting Google Drive offline files. Files marked as "Available offline" or in use will not be deleted.
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SIZE_CALCULATING" desc="In storage manager overlay, label for storage item's size indicating the size is being calculated.">
     Calculating...
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SIZE_UNKNOWN" desc="In storage manager overlay, label for storage item's size indicating the size is unknown">
     Unknown
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_ITEM_LABEL_CAPACITY" desc="In storage manager overlay, label for the total size of Chrome OS internal storage.">
     Capacity
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_ITEM_LABEL_IN_USE" desc="In storage manager overlay, label for the used storage size of Chrome OS internal storage.">
     In use
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_ITEM_LABEL_AVAILABLE" desc="In storage manager overlay, label for the available storage size of Chrome OS internal storage.">
     Available
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_DOWNLOADS" desc="In storage manager overlay, label for the size of Downloads directory.">
     Downloads
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_DRIVE_CACHE" desc="In storage manager overlay, label for the size of Google Drive's offline files.">
     Offline files
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_ARC" desc="In storage manager overlay, label for the total size size of Android apps and cache.">
-    Android apps and cache
+    Android storage
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_DELETE_ALL_BUTTON_TITLE" desc="In storage manager overlay, label for the total size size of Android apps and cache.">
     Delete all
   </message>
   <message name="IDS_OPTIONS_ACCOUNTS_ALLOW_BWSI_DESCRIPTION" desc="In the Accounts settings tab, the text on the checkbox to allow browse without signing in.">
     Enable Guest browsing
   </message>
   <message name="IDS_OPTIONS_ACCOUNTS_ENABLE_SUPERVISED_USERS" desc="In the Users settings dialog, the text on the checkbox to allow creation and sign-in of supervised users.">
     Enable supervised users
   </message>
@@ skipping 4105 matching lines @@
   <message name="IDS_ARC_ANDROID_MANAGEMENT_REQUIRED_ERROR" desc="Error message shown when Android management is required for an unmanaged Chrome OS user.">
     Your organization has not enabled Android Apps for your account. Contact your administrator for more information.
   </message>
   <message name="IDS_FLAGS_ENABLE_IME_MENU_NAME" desc="Name of the about: flag for enabling opt-in IME menu.">
     Enable opt-in IME menu
     </message>
   <message name="IDS_FLAGS_ENABLE_IME_MENU_DESCRIPTION" desc="Description of the about: flag for enabling opt-in IME menu.">
     Enable access to the new IME menu in the Language Settings page.
   </message>
 </grit-part>