Files app: Rename the label to open sharing dialog for Google Drive files.

To be consistent with the dialog title and make it easier to distinguish it from
other share-related actions, we rename the label which is used in following
locations.
- Menu item label in context menu.
- Spoken feedback label for the toolbar button.
- Tooltip label for the toolbar button.
All of them uses the same dictionary entry.

Bug: 740817
Change-Id: If6f893bbd2a4595b75e8694fa88b5283d3327af1
Reviewed-on: https://chromium-review.googlesource.com/566784Reviewed-by: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Commit-Queue: Naoki Fukino <fukino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485577}

chrome/app/chromeos_strings.grdp

@@ -511,8 +511,8 @@ Press any key to continue exploring.
   <message name="IDS_FILE_BROWSER_REMOVE_FOLDER_SHORTCUT_BUTTON_LABEL" desc="Menu item label, unpinning the selected folder from the left nav.">
     Remove shortcut
   </message>
-  <message name="IDS_FILE_BROWSER_SHARE_BUTTON_LABEL" desc="Menu item label, showing dialog to share the selected file.">
-    Share
+  <message name="IDS_FILE_BROWSER_SHARE_BUTTON_LABEL" desc="Menu item's label, showing dialog to share the selected Google Drive files. This message is also used as a tooltip label and a spoken feedback label of a button which also shows the dialog to share the files. The translation should be consistent with the sharing dialog's title in Google Drive Web UI.">
+    Share with others
   </message>
   <message name="IDS_FILE_BROWSER_TOGGLE_HIDDEN_FILES_COMMAND_LABEL" desc="Label for menu or button with checkmark that toggles visibility of hidden files.">
     Show hidden files