Implement ui::ClipboardMus.

ui/base/clipboard/clipboard_test_template.h

 // Copyright (c) 2012 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.
 //
 // Note: This header doesn't use REGISTER_TYPED_TEST_CASE_P like most
 // type-parameterized gtests. There are lot of test cases in here that are only
 // enabled on certain platforms. However, preprocessor directives in macro
 // arguments result in undefined behavior (and don't work on MSVC). Instead,
 // 'parameterized' tests should typedef TypesToTest (which is used to
 // instantiate the tests using the TYPED_TEST_CASE macro) and then #include this
@@ skipping 38 matching lines @@
 
 using testing::Contains;
 
 namespace ui {
 
 template <typename ClipboardTraits>
 class ClipboardTest : public PlatformTest {
  public:
 #if defined(USE_AURA)
   ClipboardTest()
-      : event_source_(PlatformEventSource::CreateDefault()),
+      : event_source_(ClipboardTraits::GetEventSource()),
         clipboard_(ClipboardTraits::Create()) {}
 #else
   ClipboardTest() : clipboard_(ClipboardTraits::Create()) {}
 #endif
 
   ~ClipboardTest() override { ClipboardTraits::Destroy(clipboard_); }
 
  protected:
   Clipboard& clipboard() { return *clipboard_; }
 
@@ skipping 600 matching lines @@
   ScopedClipboardWriter scw(CLIPBOARD_TYPE_COPY_PASTE);
   scw.WritePickledData(base::Pickle(), Clipboard::GetPlainTextFormatType());
 }
 
 TYPED_TEST(ClipboardTest, WriteImageEmptyParams) {
   ScopedClipboardWriter scw(CLIPBOARD_TYPE_COPY_PASTE);
   scw.WriteImage(SkBitmap());
 }
 
 }  // namespace ui