Standardize parameters passed when Tabs are created asynchronously.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/AsyncTabCreationParamsManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/AsyncTabCreationParamsManager.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/AsyncTabCreationParamsManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..bf860cb44d69df106e6e6c66f9adb8c15e841db5
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/AsyncTabCreationParamsManager.java
@@ -0,0 +1,48 @@
+// Copyright 2015 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.util.SparseArray;
+
+import org.chromium.base.ThreadUtils;
+
+/**
+ * Data that will be used later when a tab is opened via an intent. Often only the necessary
+ * subset of the data will be set. All data is removed once the tab finishes initializing.
+ */
+public class AsyncTabCreationParamsManager {
+    /** A map of tab IDs to AsyncTabCreationParams consumed by Activities started asynchronously. */
+    private static SparseArray<AsyncTabCreationParams> sAsyncTabCreationParams;
+
+    /**
+     * Stores AsyncTabCreationParams used when the tab with the given ID is launched via intent.
+     * @param tabId The ID of the tab that will be launched via intent.
+     * @param params The AsyncTabCreationParams to use when creating the Tab.
+     */
+    public static void add(int tabId, AsyncTabCreationParams params) {
+        ensureInitialized();
+        sAsyncTabCreationParams.put(tabId, params);
+    }
+
+    /**
+     * @return Retrieves and removes AsyncTabCreationParams for a particular tab id.
+     */
+    public static AsyncTabCreationParams remove(int tabId) {
+        ensureInitialized();
+        AsyncTabCreationParams data = sAsyncTabCreationParams.get(tabId);
+        sAsyncTabCreationParams.remove(tabId);
+        return data;
+    }
+
+    private static void ensureInitialized() {
+        ThreadUtils.assertOnUiThread();
+        if (sAsyncTabCreationParams == null) {
+            sAsyncTabCreationParams = new SparseArray<AsyncTabCreationParams>();
+        }
+    }
+
+    private AsyncTabCreationParamsManager() {
+    }
+}