Flip 32-bit warning string to let users know it’s the end of the line

chrome/browser/mac/obsolete_system.h

Index: chrome/browser/mac/obsolete_system.h
diff --git a/chrome/browser/mac/obsolete_system.h b/chrome/browser/mac/obsolete_system.h
index d0bb8e54ce00c184458dbc77417baddb412c8699..c372770f1f1557bbdceedd41e50c2a47b686685f 100644
--- a/chrome/browser/mac/obsolete_system.h
+++ b/chrome/browser/mac/obsolete_system.h
@@ -45,9 +45,7 @@ class ObsoleteSystemMac {
 
   // true if this is the final release that will run on 32-bit-only systems.
   static bool Is32BitEndOfTheLine() {
-    // TODO(mark): Change to true immediately prior to the final build that
-    // supports 32-bit-only systems.
-    return false;
+    return true;
   }
 
  private: