Add a button to OIB to launch an instant app if it exists.

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java

Index: chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
index 114ce03eee43f6baf0102816741299d8170a3436..c72e8df22158c17195d970e11161fef241c95d6f 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java
@@ -34,7 +34,6 @@ import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
-import org.chromium.chrome.browser.ChromeApplication;
 import org.chromium.chrome.browser.ChromeTabbedActivity2;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
@@ -562,8 +561,8 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
 
     @Override
     public boolean maybeLaunchInstantApp(String url, String referrerUrl) {
-        return InstantAppsHandler.getInstance((ChromeApplication) mApplicationContext)
-                .handleNavigation(getAvailableContext(), url,
-                        TextUtils.isEmpty(referrerUrl) ? null : Uri.parse(referrerUrl));
+        return InstantAppsHandler.getInstance().handleNavigation(
+                getAvailableContext(), url,

[Maria, 2016/09/26 17:36:25]

nit: move to previous line?

[Ted C, 2016/09/26 18:05:04]

Done.

+                TextUtils.isEmpty(referrerUrl) ? null : Uri.parse(referrerUrl));
     }
 }