Move import-lock dialog string to generic strings.

"Close Firefox..." no longer mentions Chromium or Google Chrome so it
can be used as a generic string. This fixes the current mismatch between
Chromium/Google Chrome as only the former was updated for the new dialog
string.

Bug: chromium:754034
Change-Id: I4cfcf53057be681142ea8684a40b6b3eee33e436
Reviewed-on: https://chromium-review.googlesource.com/745310Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513072}

chrome/app/chromium_strings.grd

@@ -241,9 +241,6 @@ If you update this file, be sure also to update google_chrome_strings.grd. -->
           Chromium is unresponsive. Relaunch now?
         </message>
       </if>
-      <message name="IDS_IMPORTER_LOCK_TEXT" desc="The message to be displayed on dialog">
-        To finish importing, close all Firefox windows.
-      </message>
       <!-- Uninstall messages -->
       <if expr="is_win">
         <message name="IDS_UNINSTALL_CLOSE_APP" desc="Message to user when uninstall detects other app instance running">

chrome/app/generated_resources.grd

@@ -5512,6 +5512,9 @@ the Bookmarks menu.">
       </if>
 
       <!-- Importer Lock Dialog -->
+      <message name="IDS_IMPORTER_LOCK_TEXT" desc="The message to be displayed in the importer-lock dialog">
+        To finish importing, close all Firefox windows.
+      </message>
       <if expr="use_titlecase">
         <message name="IDS_IMPORTER_LOCK_TITLE" desc="Dialog title for importer lock dialog">
           Close Firefox

chrome/app/google_chrome_strings.grd

@@ -251,9 +251,6 @@ chromium_strings.grd. -->
           Google Chrome is unresponsive. Relaunch now?
         </message>
       </if>
-      <message name="IDS_IMPORTER_LOCK_TEXT" desc="The message to be displayed on dialog">
-        Sadly, your Mozilla Firefox settings are not available while that browser is running. To import those settings to Google Chrome, save your work and close all Firefox windows. Then click Continue.
-      </message>
       <!-- Uninstall messages -->
       <if expr="is_win">
         <message name="IDS_UNINSTALL_CLOSE_APP" desc="Message to user when uninstall detects other app instance running">