Instant Apps: refactor logic to encapsulate in the Instant Apps Handler.

chrome/android/javatests/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandlerTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandlerTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandlerTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandlerTest.java
index 97ecaa13004f1069f591f2b5afd71e061c2417ee..f94af5b492caeb797aa1f7468366dff4173b5f59 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandlerTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandlerTest.java
@@ -99,6 +99,10 @@ public class ExternalNavigationHandlerTest extends NativeLibraryTestBase {
     private static final String COUNTERFEIT_WEBAPK_PACKAGE_NAME =
             "org.chromium.webapk.counterfeit";
 
+    private static final String[] SUPERVISOR_START_ACTIONS = {

[Ted C, 2017/03/01 16:55:51]

I've vote to make the other ones public and marked @VisibleForTesting instead of
copying them here.

[Maria, 2017/03/01 17:43:39]

That's what I did in patch 1. Turns out it's a findbugs error to have a public
static final mutable container (array). That's why I copied them here. The error
didn't show up before because they were package protected and findbugs only
complains about public exposure.

+            "com.google.android.instantapps.START", "com.google.android.instantapps.nmr1.INSTALL",
+            "com.google.android.instantapps.nmr1.VIEW"};
+
     private final TestExternalNavigationDelegate mDelegate;
     private ExternalNavigationHandler mUrlHandler;
 
@@ -623,7 +627,7 @@ public class ExternalNavigationHandlerTest extends NativeLibraryTestBase {
                 InstantAppsHandler.IS_GOOGLE_SEARCH_REFERRER));
 
         // Check that Supervisor is detected by action even without package
-        for (String action : ExternalNavigationHandler.SUPERVISOR_START_ACTIONS) {
+        for (String action : SUPERVISOR_START_ACTIONS) {
             String intentWithoutPackage = "intent://buzzfeed.com/tasty#Intent;scheme=http;"
                     + "action=" + action + ";"
                     + "S.com.google.android.instantapps.FALLBACK_PACKAGE="