Use remembered mouse button state when simulating a mouse move in Ozone.

chrome/browser/ui/views/drag_and_drop_interactive_uitest.cc

 // Copyright 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 <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 571 matching lines @@
   {
     DOMDragEventWaiter drop_waiter("drop", right_frame());
     ASSERT_TRUE(SimulateDropInRightFrame());
 
     std::string drop_event;
     ASSERT_TRUE(drop_waiter.WaitForNextMatchingEvent(&drop_event));
     EXPECT_THAT(drop_event, expected_dom_event_data.Matches());
   }
 }
 
-// The test is disabled on Ozone because of trouble with mouse simulation
-// during the test - see https://crbug.com/665042.
-#if defined(USE_OZONE)
-#define MAYBE_DragStartInFrame DISABLED_DragStartInFrame
-#else
-#define MAYBE_DragStartInFrame DragStartInFrame
-#endif
-IN_PROC_BROWSER_TEST_F(DragAndDropBrowserTest, MAYBE_DragStartInFrame) {
+IN_PROC_BROWSER_TEST_F(DragAndDropBrowserTest, DragStartInFrame) {
   std::string frame_site = "b.com";
   ASSERT_TRUE(NavigateToTestPage("a.com"));
   ASSERT_TRUE(NavigateLeftFrame(frame_site, "image_source.html"));
 
   // Setup test expectations.
   // (dragstart event handler in image_source.html is asking for "copy" only).
   DOMDragEventVerifier expected_dom_event_data;
   expected_dom_event_data.set_expected_drop_effect("none");
   expected_dom_event_data.set_expected_effect_allowed("copy");
   expected_dom_event_data.set_expected_mime_types(
@@ skipping 30 matching lines @@
     EXPECT_EQ(expected_location_of_drag_start_in_left_frame(),
               location_inside_web_contents);
     EXPECT_EQ(ui::DragDropTypes::DRAG_COPY, operation);
   }
 
   // Try to leave everything in a clean state.
   SimulateMouseUp();
 }
 
 }  // namespace chrome