android: Use existing acitivty alias constant

Change-Id: I3c581c708164deb86641bbe178ed54fcb659e165
Reviewed-on: https://chromium-review.googlesource.com/c/1450022
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631493}
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
index f549a57..afc33c4 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
@@ -386,7 +386,7 @@
                 || TextUtils.equals(
                         componentName, MultiInstanceChromeTabbedActivity.class.getName())
                 || TextUtils.equals(componentName, ChromeTabbedActivity2.class.getName())
-                || TextUtils.equals(componentName, "com.google.android.apps.chrome.Main");
+                || TextUtils.equals(componentName, MAIN_LAUNCHER_ACTIVITY_NAME);
     }
 
     /**