Do not use assets for Ash window control button backgrounds

chrome/browser/ui/layout_constants.cc

Index: chrome/browser/ui/layout_constants.cc
diff --git a/chrome/browser/ui/layout_constants.cc b/chrome/browser/ui/layout_constants.cc
index 3a4a34a2c5a8a196ce140b9e5e587b8d89487b0d..e6f8ef12f4972590d5589250c0e5096261bcf553 100644
--- a/chrome/browser/ui/layout_constants.cc
+++ b/chrome/browser/ui/layout_constants.cc
@@ -8,6 +8,10 @@
 #include "ui/base/resource/material_design/material_design_controller.h"
 
 int GetLayoutConstant(LayoutConstant constant) {
+  const int kAshBrowserMaximizedHeaderButtonHeight[] = {27, 32, 36};
+  const int kAshBrowserMaximizedHeaderButtonWidth[] = {35, 32, 32};
+  const int kAshBrowserRestoredHeaderButtonHeight[] = {35, 36, 40};
+  const int kAshBrowserRestoredHeaderButtonWidth[] = {35, 32, 32};
   const int kFindBarVerticalOffset[] = {1, 6, 6};
   const int kIconLabelViewInternalPadding[] = {3, 2, 2};
   const int kIconLabelViewTrailingPadding[] = {2, 8, 8};
@@ -42,6 +46,14 @@ int GetLayoutConstant(LayoutConstant constant) {
 
   const int mode = ui::MaterialDesignController::GetMode();
   switch (constant) {
+    case ASH_BROWSER_MAXIMIZED_HEADER_BUTTON_HEIGHT:
+      return kAshBrowserMaximizedHeaderButtonHeight[mode];
+    case ASH_BROWSER_MAXIMIZED_HEADER_BUTTON_WIDTH:
+      return kAshBrowserMaximizedHeaderButtonWidth[mode];
+    case ASH_BROWSER_RESTORED_HEADER_BUTTON_HEIGHT:
+      return kAshBrowserRestoredHeaderButtonHeight[mode];
+    case ASH_BROWSER_RESTORED_HEADER_BUTTON_WIDTH:
+      return kAshBrowserRestoredHeaderButtonWidth[mode];
     case FIND_BAR_TOOLBAR_OVERLAP:
       return kFindBarVerticalOffset[mode];
     case ICON_LABEL_VIEW_INTERNAL_PADDING: