Change the string "Request tablet site" to "Request mobile site".

According to the mock, change the string "Request tablet site" to
"Request mobile site".

Bug: 953577
Change-Id: Ie037b06466db3bb73cc28edd409d939fb46522e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1634713Reviewed-by: Min Chen <minch@chromium.org>
Commit-Queue: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664524}

chrome/app/generated_resources.grd

@@ -1098,8 +1098,8 @@ are declared in tools/grit/grit_rule.gni.
 
       <!-- App menu -->
       <if expr="chromeos">
-        <message name="IDS_TOGGLE_REQUEST_TABLET_SITE" desc="The toggle to request tablet site on a touch dev.">
-          Request tablet site
+        <message name="IDS_TOGGLE_REQUEST_TABLET_SITE" desc="The toggle to request mobile version site on a touch dev.">
+          Request mobile site
         </message>
       </if>
       <message name="IDS_HELP_MENU" desc="The text label of the Help sub-menu item in the wrench menu">

chrome/app/generated_resources_grd/IDS_TOGGLE_REQUEST_TABLET_SITE.png.sha1

+ce6da562bd442c6207cf6311edf18646511c3ae6
\ No newline at end of file