CrOS: Add minimum spacing between SearchBox and Shelf.

Bug: 1007204
Change-Id: Ic6bea1eef809db4e995040d4bee82ea05aa57c7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1838978Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Commit-Queue: Yulun Wu <yulunwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703499}

ash/app_list/views/search_result_page_view.cc

@@ -58,6 +58,9 @@ constexpr int kSearchBoxHeight = 56;
 // due to the round up.
 constexpr int kSearchBoxBottomSpacing = 1;
 
+// Minimum spacing between shelf and bottom of search box.
+constexpr int kSearchResultPageMinimumBottomMargin = 24;
+
 constexpr SkColor kSeparatorColor = SkColorSetA(gfx::kGoogleGrey900, 0x24);
 
 // The shadow elevation value for the shadow of the expanded search box.
@@ -530,8 +533,16 @@ gfx::Rect SearchResultPageView::GetPageBoundsForState(
     // Hides this view behind the search box by using the same bounds.
     return search_box_bounds;
   }
-  return gfx::Rect(search_box_bounds.origin(),
-                   gfx::Size(search_box_bounds.width(), kHeight));
+
+  gfx::Rect bounding_rect = contents_bounds;
+  bounding_rect.Inset(0, 0, 0, kSearchResultPageMinimumBottomMargin);
+
+  gfx::Rect preferred_bounds =
+      gfx::Rect(search_box_bounds.origin(),
+                gfx::Size(search_box_bounds.width(), kHeight));
+  preferred_bounds.Intersect(bounding_rect);
+
+  return preferred_bounds;
 }
 
 views::View* SearchResultPageView::GetFirstFocusableView() {