Upstream DocumentTabModelImpl and related classes

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java
new file mode 100644
index 0000000000000000000000000000000000000000..f152845dd886ae97802bcfdcce66bb82a9aec142
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java
@@ -0,0 +1,45 @@
+// Copyright 2014 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.tabmodel.document;
+
+import android.app.Activity;
+
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.tabmodel.document.DocumentTabModel.Entry;
+
+/**
+ * Provides Tabs to a DocumentTabModel.
+ */
+public interface TabDelegate {
+    /**
+     * Returns the Tab for the given Activity.
+     * @param incognito Whether the Activity is supposed to hold an incognito Tab.
+     * @param delgate Sotres information about DocumentActivities.
+     * @param activity Activity to grab the Tab of.
+     * @return Tab for the DocumentActivity, if it is a valid DocumentActivity.  Null otherwise.
+     */
+    Tab getActivityTab(boolean incognito, ActivityDelegate delgate, Activity activity);
+
+    /**
+     * Creates a frozen Tab for the Entry.
+     * @param entry Entry containing TabState.
+     * @return A frozen Tab.
+     */
+    Tab createFrozenTab(Entry entry);
+
+    /**
+     * Creates a new Activity for the pre-created WebContents.
+     * @param isIncognito Whether the Activity is supposed to hold an incognito Tab.
+     * @param webContentsPtr Native-side WebContents pointer to use for the new Tab.
+     * @param parentTabId ID of the spawning Tab.
+     */
+    void createTabWithNativeContents(boolean isIncognito, long webContentsPtr, int parentTabId);
+
+    /**
+     * Creates a new Tab for a URL typed into DevTools.
+     * @param url URL to spawn a Tab for.
+     */
+    void createTabForDevTools(String url);
+}