Instant Apps: Allow custom tab redirects to Instant Apps.

chrome/android/java/src/org/chromium/chrome/browser/tab/TabRedirectHandler.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/TabRedirectHandler.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/TabRedirectHandler.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/TabRedirectHandler.java
index 7ec63dc7d1e1c3577a1ca0f1d4de4ddc49fc5df6..40632f777be79dd91b1b718eb92f52d906fada94 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/TabRedirectHandler.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/TabRedirectHandler.java
@@ -199,7 +199,15 @@ public class TabRedirectHandler {
      */
     public boolean shouldStayInChrome(boolean hasExternalProtocol) {
         return (mIsInitialIntentHeadingToChrome && !hasExternalProtocol)
-                || mInitialNavigationType == NAVIGATION_TYPE_FROM_LINK_WITHOUT_USER_GESTURE
+                || shouldNavigationTypeStayInChrome();
+
+    }
+
+    /**
+     * @return Whether the current navigation is of the type that should always stay in Chrome.
+     */
+    public boolean shouldNavigationTypeStayInChrome() {
+        return mInitialNavigationType == NAVIGATION_TYPE_FROM_LINK_WITHOUT_USER_GESTURE
                 || mInitialNavigationType == NAVIGATION_TYPE_FROM_RELOAD;
     }