Reland: Fix X11TopmostWindowFinder

ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc

 // Copyright (c) 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 "ui/views/widget/desktop_aura/desktop_screen_x11.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 310 matching lines @@
 
   window_three->Show();
   window_two->Show();
   window_one->Show();
 
   // Make sure the internal state of DesktopWindowTreeHostX11 is set up
   // correctly.
   ASSERT_EQ(3u, DesktopWindowTreeHostX11::GetAllOpenWindows().size());
 
   EXPECT_EQ(window_one->GetNativeWindow(),
-            screen()->GetWindowAtScreenPoint(gfx::Point(115, 115)));
+            screen()->GetWindowAtScreenPoint(gfx::Point(117, 117)));

[pkotwicz, 2014/05/16 16:56:56]

The code now takes into account the fact that the window has rounded corners. So
we cannot use the coordinates of the top left hand corner of |window_three|.

   EXPECT_EQ(window_two->GetNativeWindow(),
             screen()->GetWindowAtScreenPoint(gfx::Point(155, 155)));
   EXPECT_EQ(NULL,
             screen()->GetWindowAtScreenPoint(gfx::Point(200, 200)));
 
   // Bring the third window in front. It overlaps with the first window.
   // Hit-testing on the intersecting region should give the third window.
   ActivationWaiter activation_waiter(window_three);
   window_three->Activate();
   activation_waiter.Wait();
 
   EXPECT_EQ(window_three->GetNativeWindow(),
-            screen()->GetWindowAtScreenPoint(gfx::Point(115, 115)));
+            screen()->GetWindowAtScreenPoint(gfx::Point(117, 117)));
 
   window_one->CloseNow();
   window_two->CloseNow();
   window_three->CloseNow();
 }
 
 TEST_F(DesktopScreenX11Test, GetDisplayNearestWindow) {
   // Set up a two monitor situation.
   std::vector<gfx::Display> displays;
   displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
@@ skipping 94 matching lines @@
   generator.ReleaseRightButton();
   EXPECT_FALSE(rwh->IsMaximized());
   generator.DoubleClickLeftButton();
   RunPendingMessages();
   EXPECT_FALSE(rwh->IsMaximized());
 
   widget->CloseNow();
 }
 
 }  // namespace views