Fix tests in when MD is set to EXPERIMENTAL by default

ash/system/toast/toast_manager_unittest.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 "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/system/toast/toast_manager.h"
 #include "ash/display/display_manager.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
@@ skipping 205 matching lines @@
 
 TEST_F(ToastManagerTest, PositionWithVisibleLeftShelf) {
   WmShelf* shelf = GetPrimaryShelf();
   EXPECT_EQ(SHELF_VISIBLE, shelf->GetVisibilityState());
   shelf->SetAlignment(SHELF_ALIGNMENT_LEFT);
 
   ShowToast("DUMMY", ToastData::kInfiniteDuration);
   EXPECT_EQ(1, GetToastSerial());
 
   gfx::Rect toast_bounds = GetCurrentWidget()->GetWindowBoundsInScreen();
+  gfx::RectF precise_toast_bounds(toast_bounds);
   gfx::Rect root_bounds =
       ScreenUtil::GetShelfDisplayBoundsInRoot(Shell::GetPrimaryRootWindow());
 
   EXPECT_TRUE(toast_bounds.Intersects(shelf->GetUserWorkAreaBounds()));
   EXPECT_EQ(root_bounds.bottom() - 5, toast_bounds.bottom());
 
   if (SupportsHostWindowResize()) {
     // If host resize is not supported then calling WmShelf::GetIdealBounds()
     // doesn't return correct value.
     gfx::Rect shelf_bounds = shelf->GetIdealBounds();
     EXPECT_FALSE(toast_bounds.Intersects(shelf_bounds));
-    EXPECT_EQ(
-        shelf_bounds.right() + (root_bounds.width() - shelf_bounds.width()) / 2,
-        toast_bounds.CenterPoint().x());
+    EXPECT_EQ(round(shelf_bounds.right() +
+                    (root_bounds.width() - shelf_bounds.width()) / 2.0),
+              round(precise_toast_bounds.CenterPoint().x()));
   }
 }
 
 TEST_F(ToastManagerTest, PositionWithUnifiedDesktop) {
   if (!SupportsMultipleDisplays())
     return;
 
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
   display_manager->SetUnifiedDesktopEnabled(true);
   UpdateDisplay("1000x500,0+600-100x500");
@@ skipping 41 matching lines @@
   EXPECT_EQ("TEXT3", GetCurrentText());
   // Cancel the shown toast.
   CancelToast(id3);
   // Confirm that the shown toast disappears.
   EXPECT_FALSE(GetCurrentOverlay());
   // Confirm that only 1 toast is shown.
   EXPECT_EQ(2, GetToastSerial());
 }
 
 }  // namespace ash