EXO: Fix FullscreenShellSurface Bounds Unittest

Fix bounds unittest to make sure an offset from fullscreen_surface
will be detected.

Bug: 896710
Test: FullscreenShellSurfaceTest.Bounds
Change-Id: Ia8e3213b5c854f423537a9d0e58455f3d497bea7
Reviewed-on: https://chromium-review.googlesource.com/c/1340863Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Commit-Queue: Shawn Gallea <sagallea@google.com>
Cr-Commit-Position: refs/heads/master@{#608926}

components/exo/fullscreen_shell_surface_unittest.cc

@@ -173,7 +173,8 @@ TEST_F(FullscreenShellSurfaceTest, Bounds) {
   surface->Commit();
   gfx::Rect fullscreen_bounds =
       fullscreen_surface->GetWidget()->GetWindowBoundsInScreen();
-  EXPECT_EQ(fullscreen_bounds.size(), new_root_bounds.size());
+  gfx::Rect expected_bounds(new_root_bounds.size());
+  EXPECT_EQ(fullscreen_bounds, expected_bounds);
 }
 
 }  // namespace