Implement InstanceID API functions.

chrome/test/data/extensions/api_test/instance_id/delete_id/delete_id.js

Index: chrome/test/data/extensions/api_test/instance_id/delete_id/delete_id.js
diff --git a/chrome/test/data/extensions/api_test/instance_id/delete_id/delete_id.js b/chrome/test/data/extensions/api_test/instance_id/delete_id/delete_id.js
new file mode 100644
index 0000000000000000000000000000000000000000..236285c0d2c254e03d4cb82631268fd8e736d907
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/instance_id/delete_id/delete_id.js
@@ -0,0 +1,56 @@
+// 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.
+
+function deleteIDWithoutCallback() {
+  try {
+    chrome.instanceID.deleteID();
+    chrome.test.fail(
+        "Calling deleteID without callback should fail.");
+  } catch (e) {
+    chrome.test.succeed();
+  };
+}
+
+function deleteIDWithCallback() {
+  chrome.instanceID.deleteID(function() {
+    if (chrome.runtime.lastError) {
+      chrome.test.fail(
+          "chrome.runtime.lastError: " + chrome.runtime.lastError.message);
+      return;
+    }
+
+    chrome.test.succeed();
+  });
+}
+
+var oldID;
+function deleteAfterGetID() {
+  chrome.instanceID.getID(function(id) {
+    if (!id) {

[fgorski, 2015/05/07 19:59:53]

nit: does it make sense to add || chrome.runtime.lastError?

[jianli, 2015/05/07 20:47:01]

Done.

+      chrome.test.fail("ID should not be zero.");

[fgorski, 2015/05/07 19:59:53]

nit: s/zero/empty/

[jianli, 2015/05/07 20:47:01]

Done.

+      return;
+    }
+    oldID = id;
+    chrome.instanceID.deleteID(function(creationTime) {
+      if (chrome.runtime.lastError) {
+        chrome.test.fail(
+            "chrome.runtime.lastError: " + chrome.runtime.lastError.message);
+        return;
+      }
+      chrome.instanceID.getID(function(id) {
+        if (!id || id == oldID) {
+          chrome.test.fail("Different ID should be returned after deleteID.");
+          return;
+        }
+        chrome.test.succeed();
+      });
+    });
+  });
+}
+
+chrome.test.runTests([
+  deleteIDWithoutCallback,
+  deleteIDWithCallback,
+  deleteAfterGetID,
+]);