Add EXTERNAL_INTENT as a non-homescreen launch option.

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappInfo.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappInfo.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappInfo.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappInfo.java
index 2e8f8bfaa0985df1383ce5ea82736b3f9f467b98..bb3693916811bc3062c7d8ff726012169c3bab19 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappInfo.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappInfo.java
@@ -317,6 +317,7 @@ public class WebappInfo {
      * opposed to an intent from a push notification or other internal source).
      */
     public boolean isLaunchedFromHomescreen() {
-        return source() != ShortcutSource.NOTIFICATION;
+        int source = source();
+        return source != ShortcutSource.NOTIFICATION && source != ShortcutSource.EXTERNAL_INTENT;
     }
 }