Remove unused IntentHandler.isIntentFromTrustedApp()

Bug: 832124
Change-Id: Ieb671aa0111a494ba8f0fff068be100e9f5d5143
Reviewed-on: https://chromium-review.googlesource.com/1217757Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590405}

chrome/android/java/src/org/chromium/chrome/browser/IntentHandler.java

@@ -950,21 +950,6 @@ public class IntentHandler {
         return false;
     }
 
-    /**
-     * @param intent An Intent to be checked.
-     * @param packageName The app where the intent is expected to originate from
-     * @return Whether the intent originates from the first-party app with the given package name.
-     */
-    public static boolean isIntentFromTrustedApp(Intent intent, String packageName) {
-        if (intent == null) return false;
-
-        PendingIntent token = fetchAuthenticationTokenFromIntent(intent);
-        if (token == null) return false;
-
-        return isIntentChromeOrFirstParty(intent)
-                && ApiCompatibilityUtils.getCreatorPackage(token).equals(packageName);
-    }
-
     @VisibleForTesting
     boolean isIntentUserVisible() {
         // Only process Intents if the screen is on and the device is unlocked;