Fix 1px gap for odd display size in nocturne

Bug: 884889
Change-Id: If9c93d44de4693ded68e09947d8bee1fff00c471
Reviewed-on: https://chromium-review.googlesource.com/1246151
Commit-Queue: Weidong Guo <weidongg@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594472}

ash/app_list/views/app_list_view.cc

@@ -657,8 +657,7 @@ void AppListView::InitializeFullscreen(gfx::NativeView parent) {
                                         : display_work_area_bounds.bottom();
   gfx::Rect app_list_overlay_view_bounds(
       display_nearest_view.bounds().x(), overlay_view_bounds_y,
-      display_nearest_view.bounds().width(),
-      display_nearest_view.bounds().height());
+      parent->bounds().width(), display_nearest_view.bounds().height());
 
   // The app list container fills the screen, so convert to local coordinates.
   gfx::Rect local_bounds = app_list_overlay_view_bounds;

ash/wm/overview/window_grid.cc

@@ -1143,7 +1143,10 @@ void WindowGrid::InitShieldWidget() {
       SK_ColorTRANSPARENT, initial_opacity, /*parent=*/nullptr,
       /*stack_on_top=*/true);
   aura::Window* widget_window = shield_widget_->GetNativeWindow();
-  const gfx::Rect bounds = widget_window->parent()->bounds();
+  aura::Window* parent_window = widget_window->parent();
+  const gfx::Rect bounds = ash::screen_util::SnapBoundsToDisplayEdge(
+      parent_window->bounds(), parent_window);
+  parent_window->SetBounds(bounds);
   widget_window->SetBounds(bounds);
   widget_window->SetName("OverviewModeShield");