Update shelf spacing in Chrome OS according to the MD specs

ash/shelf/shelf_view_unittest.cc

Index: ash/shelf/shelf_view_unittest.cc
diff --git a/ash/shelf/shelf_view_unittest.cc b/ash/shelf/shelf_view_unittest.cc
index 6b67adf87b0fbbde589cfc6dfb895f181282f2f4..85a049c8631d594dcba5d9243c8ef3c80eee966c 100644
--- a/ash/shelf/shelf_view_unittest.cc
+++ b/ash/shelf/shelf_view_unittest.cc
@@ -314,7 +314,7 @@ class ShelfViewTest : public AshTestBase {
     shelf_view_ = ShelfTestAPI(shelf).shelf_view();
 
     // The bounds should be big enough for 4 buttons + overflow chevron.
-    shelf_view_->SetBounds(0, 0, 500, kShelfSize);
+    shelf_view_->SetBounds(0, 0, 500, GetShelfConstant(SHELF_SIZE));
 
     test_api_.reset(new ShelfViewTestAPI(shelf_view_));
     test_api_->SetAnimationDuration(1);  // Speeds up animation for test.
@@ -1585,7 +1585,7 @@ TEST_F(ShelfViewTest, ResizeDuringOverflowAddAnimation) {
 
   // Resize shelf view with that animation running and stay overflown.
   gfx::Rect bounds = shelf_view_->bounds();
-  bounds.set_width(bounds.width() - kShelfSize);
+  bounds.set_width(bounds.width() - GetShelfConstant(SHELF_SIZE));
   shelf_view_->SetBoundsRect(bounds);
   ASSERT_TRUE(test_api_->IsOverflowButtonVisible());
 
@@ -1720,7 +1720,7 @@ TEST_F(ShelfViewTest, CheckDragInsertBoundsWithMultiMonitor) {
       ShelfTestAPI(secondary_shelf).shelf_view();
 
   // The bounds should be big enough for 4 buttons + overflow chevron.
-  shelf_view_for_secondary->SetBounds(0, 0, 500, kShelfSize);
+  shelf_view_for_secondary->SetBounds(0, 0, 500, GetShelfConstant(SHELF_SIZE));
 
   ShelfViewTestAPI test_api_for_secondary(shelf_view_for_secondary);
   // Speeds up animation for test.