[WebAPKs] Show minibar when WebAPK navigates outside scope specified in Web Manifest

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

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappBrowserControlsDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappBrowserControlsDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappBrowserControlsDelegate.java
new file mode 100644
index 0000000000000000000000000000000000000000..8693831d8838c54d89643cb96641a10b44db8aff
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappBrowserControlsDelegate.java
@@ -0,0 +1,60 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.webapps;
+
+import android.text.TextUtils;
+
+import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.chrome.browser.tab.TabStateBrowserControlsVisibilityDelegate;
+import org.chromium.chrome.browser.util.UrlUtilities;
+import org.chromium.components.security_state.ConnectionSecurityLevel;
+
+class WebappBrowserControlsDelegate extends TabStateBrowserControlsVisibilityDelegate {
+    private final WebappActivity mActivity;
+
+    public WebappBrowserControlsDelegate(WebappActivity activity, Tab tab) {
+        super(tab);
+        mActivity = activity;
+    }
+
+    @Override
+    public boolean isShowingBrowserControlsEnabled() {
+        if (!super.isShowingBrowserControlsEnabled()) return false;
+
+        return shouldShowBrowserControls(
+                mActivity.getWebappInfo(), mTab.getUrl(), mTab.getSecurityLevel());
+    }
+
+    @Override
+    public boolean isHidingBrowserControlsEnabled() {
+        return !isShowingBrowserControlsEnabled();
+    }
+
+    /**
+     * Returns whether the browser controls should be shown when a webapp is navigated to
+     * {@link url} given the page's security level.
+     * @param info
+     * @param url The webapp's current URL
+     * @param securityLevel The security level for the webapp's current URL.
+     * @return Whether the browser controls should be shown for {@link url}.
+     */
+    public boolean shouldShowBrowserControls(
+            WebappInfo info, String url, int securityLevel) {
+        // Do not show browser controls when URL is not ready yet.
+        if (TextUtils.isEmpty(url)) return false;
+
+        return shouldShowBrowserControlsForUrl(info, url)
+                || securityLevel == ConnectionSecurityLevel.DANGEROUS
+                || securityLevel == ConnectionSecurityLevel.SECURITY_WARNING;
+    }
+
+    /**
+     * Returns whether the browser controls should be shown when a webapp is navigated to
+     * {@link url}.
+     */
+    protected boolean shouldShowBrowserControlsForUrl(WebappInfo info, String url) {
+        return !UrlUtilities.sameDomainOrHost(info.uri().toString(), url, true);
+    }
+}