Experiment: enable WebView drag-drop test for Ozone.

chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc

 // Copyright 2013 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 "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 937 matching lines @@
 // repositions popup.
 IN_PROC_BROWSER_TEST_F(WebViewInteractiveTest, MAYBE_PopupPositioningMoved) {
   TestHelper("testMoved", "web_view/popup_positioning", NO_TEST_SERVER);
   ASSERT_TRUE(guest_web_contents());
   PopupTestHelper(gfx::Point(20, 0));
 }
 
 // Drag and drop inside a webview is currently only enabled for linux and mac,
 // but the tests don't work on anything except chromeos for now. This is because
 // of simulating mouse drag code's dependency on platforms.
-#if defined(OS_CHROMEOS) && !defined(USE_OZONE)
+#if defined(OS_CHROMEOS)
 IN_PROC_BROWSER_TEST_F(WebViewInteractiveTest, DragDropWithinWebView) {
   LoadAndLaunchPlatformApp("web_view/dnd_within_webview", "connected");
   ASSERT_TRUE(ui_test_utils::ShowAndFocusNativeWindow(GetPlatformAppWindow()));
 
   embedder_web_contents_ = GetFirstAppWindowWebContents();
   gfx::Rect offset = embedder_web_contents_->GetContainerBounds();
   corner_ = gfx::Point(offset.x(), offset.y());
 
   // In the drag drop test we add 20px padding to the page body because on
   // windows if we get too close to the edge of the window the resize cursor
@@ skipping 306 matching lines @@
   // this time.
   for (size_t i = 0; i < 4; ++i)
     SendKeyPressToPlatformApp(ui::VKEY_TAB);
   ExtensionTestMessageListener webview_button_not_focused_listener(
       "WebViewInteractiveTest.WebViewButtonWasNotFocused", false);
   webview_button_not_focused_listener.set_failure_message(
       "WebViewInteractiveTest.WebViewButtonWasFocused");
   SendMessageToEmbedder("verify");
   EXPECT_TRUE(webview_button_not_focused_listener.WaitUntilSatisfied());
 }