Add SetImageData api to chrome.clipboard.

chrome/browser/extensions/clipboard_extension_apitest_chromeos.cc

 // Copyright (c) 2016 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.
 
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "extensions/test/extension_test_message_listener.h"
 
 namespace {
 
 class ClipboardExtensionApiTest : public ExtensionApiTest {};
 
 }  // namespace
 
 IN_PROC_BROWSER_TEST_F(ClipboardExtensionApiTest, ClipboardDataChanged) {
   ExtensionTestMessageListener result_listener("success 2", false);
   ASSERT_TRUE(RunPlatformAppTest("clipboard/clipboard_data_changed"))
       << message_;
   ASSERT_TRUE(result_listener.WaitUntilSatisfied());
 }
+
+IN_PROC_BROWSER_TEST_F(ClipboardExtensionApiTest, SetImageData) {
+  ASSERT_TRUE(StartEmbeddedTestServer());
+  ExtensionTestMessageListener clipboard_change_listener(
+      "clipboard data changed 2", false);
+  ASSERT_TRUE(RunPlatformAppTest("clipboard/set_image_data"))
+      << message_;
+  ASSERT_TRUE(clipboard_change_listener.WaitUntilSatisfied());
+}