Fix flakiness of DesktopDragDropClientAuraX11Tests

ui/views/widget/desktop_aura/x11_whole_screen_move_loop.cc

 // 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.
 
 #include "ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h"
 
 #include <X11/Xlib.h>
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
 #undef RootWindow
 
@@ skipping 37 matching lines @@
   }
 
  private:
   aura::WindowTreeHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedCapturer);
 };
 
 }  // namespace
 
-X11WholeScreenMoveLoop::X11WholeScreenMoveLoop(
-    X11WholeScreenMoveLoopDelegate* delegate)
+X11WholeScreenMoveLoop::X11WholeScreenMoveLoop(X11MoveLoopDelegate* delegate)
     : delegate_(delegate),
       in_move_loop_(false),
       should_reset_mouse_flags_(false),
       grab_input_window_(None),
       canceled_(false),
       has_grab_(false),
       weak_factory_(this) {
   last_xmotion_.type = LASTEvent;
 }
 
@@ skipping 200 matching lines @@
   drag_widget_.reset();
   delegate_->OnMoveLoopEnded();
   XDestroyWindow(display, grab_input_window_);
   grab_input_window_ = None;
 
   in_move_loop_ = false;
   quit_closure_.Run();
 }
 
 void X11WholeScreenMoveLoop::SetDragImage(const gfx::ImageSkia& image,
-                                          gfx::Vector2dF offset) {
+                                          const gfx::Vector2dF& offset) {
   drag_image_ = image;
   drag_offset_ = offset;
 }
 
 bool X11WholeScreenMoveLoop::GrabPointerAndKeyboard(gfx::NativeCursor cursor) {
   XDisplay* display = gfx::GetXDisplay();
   XGrabServer(display);
 
   XUngrabPointer(display, CurrentTime);
   int ret = XGrabPointer(
@@ skipping 90 matching lines @@
     for (int x = 0; x < in_bitmap->width(); ++x) {
       if (SkColorGetA(in_row[x]) > kMinAlpha)
         return true;
     }
   }
 
   return false;
 }
 
 }  // namespace views