Mac: no app name in the task manager window title

For the Mac, it's clear what program the task manager window belongs
to. Therefore, don't put the name of the app in there.

Bug: 1098314
Change-Id: I6049c97e3336c6a47055dc7ee3ba352315f725e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2261032
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#783024}

chrome/app/chromium_strings.grd

@@ -219,9 +219,16 @@ If you update this file, be sure also to update google_chrome_strings.grd. -->
           New window
         </message>
       </if>
-      <message name="IDS_TASK_MANAGER_TITLE" desc="The title of the Task Manager window">
-        Task Manager - Chromium
-      </message>
+      <if expr="is_macosx">
+        <message name="IDS_TASK_MANAGER_TITLE" desc="The title of the Task Manager window">
+          Task Manager
+        </message>
+      </if>
+      <if expr="not is_macosx">
+        <message name="IDS_TASK_MANAGER_TITLE" desc="The title of the Task Manager window">
+          Task Manager - Chromium
+        </message>
+      </if>
       <message name="IDS_SESSION_CRASHED_VIEW_UMA_OPTIN" desc="Text besides the checkbox to let users optin to UMA in the restore from previous crash bubble.">
         Help make Chromium better by sending crash reports and <ph name="UMA_LINK">$1<ex>usage statistics</ex></ph> to Google
       </message>

chrome/app/google_chrome_strings.grd

@@ -225,9 +225,16 @@ chromium_strings.grd. -->
           New window
         </message>
       </if>
-      <message name="IDS_TASK_MANAGER_TITLE" desc="The title of the Task Manager window">
-        Task Manager - Google Chrome
-      </message>
+      <if expr="is_macosx">
+        <message name="IDS_TASK_MANAGER_TITLE" desc="The title of the Task Manager window">
+          Task Manager
+        </message>
+      </if>
+      <if expr="not is_macosx">
+        <message name="IDS_TASK_MANAGER_TITLE" desc="The title of the Task Manager window">
+          Task Manager - Google Chrome
+        </message>
+      </if>
       <message name="IDS_SESSION_CRASHED_VIEW_UMA_OPTIN" desc="Text besides the checkbox to let users optin to UMA in the restore from previous crash bubble.">
         Help make Google Chrome better by sending crash reports and <ph name="UMA_LINK">$1<ex>usage statistics</ex></ph> to Google
       </message>