Improve the UI for handling profile lock contention.

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
diff --git a/chrome/app/chromium_strings.grd b/chrome/app/chromium_strings.grd
index e07ccaa00830b4c03525265031feb9fc9c057770..363a42f67250162ee8184812aea771a2a81f5b2a 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -1051,6 +1051,15 @@ Signing in anyway will merge Chromium information like bookmarks, history, and o
       <message name="IDS_MEDIA_STREAM_STATUS_TRAY_TEXT_VIDEO_ONLY" desc="Tool tip for the capture status tray icon when camera is being used">
         Chromium is using your camera.
       </message>
+
+      <!-- ProcessSingleton -->
+      <message name="IDS_PROFILE_IN_USE_LINUX" desc="Message shown when the browser cannot start because the profile is in use on a different host.">
+        The profile appears to be in use by another Chromium process (<ph name="PROCESS_ID">$1<ex>12345</ex></ph>) on another computer (<ph name="HOST_NAME">$2<ex>example.com</ex></ph>). (To protect against data corruption, Chromium locks profiles so that only one instance of Chromium can use the profile.) If you are sure no other processes are using this profile, click Unlock Profile and Relaunch. Otherwise, click Quit.
+      </message>
+      <message name="IDS_PROFILE_IN_USE_LINUX_RELAUNCH" desc="Text of button in dialog to delete the profile lock file.">
+        Unlock Profile and Relaunch
+      </message>
+
     </messages>
   </release>
 </grit>