[Native File System] Slightly reword two strings.

Bug: 878585
Change-Id: I3ddef2ffbe1fb4242b57fb20e80549d98a877bb8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1696442
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676184}

chrome/app/generated_resources.grd

@@ -8941,10 +8941,10 @@ Please help our engineers fix this problem. Tell us what happened right before y
         </ph> - VR presenting to headset
       </message>
       <message name="IDS_TAB_AX_LABEL_NATIVE_FILE_SYSTEM_WRITABLE_FORMAT" desc="Accessibility label text, when the tab has write access to the native file system. Example: 'Google Docs - is allowed to save to original files'">
-        <ph name="WINDOW_TITLE">$1<ex>Google Docs</ex></ph> - is allowed to save to original files
+        <ph name="WINDOW_TITLE">$1<ex>Google Docs</ex></ph> - Allowed to save to original files
       </message>
       <message name="IDS_TAB_AX_LABEL_NATIVE_FILE_SYSTEM_DIRECTORY_FORMAT" desc="Accessibility label text, when the tab has read access to directories on the native file system. Example: 'Google Docs - is allowed to read a folder on your device'">
-        <ph name="WINDOW_TITLE">$1<ex>Google Docs</ex></ph> - is allowed to read a folder on your device
+        <ph name="WINDOW_TITLE">$1<ex>Google Docs</ex></ph> - Allowed to read a folder on your device
       </message>
 
       <!-- ProcessSingleton -->