Parametrize a variety of constants in preparation for changing them in MD.

chrome/browser/ui/views/frame/browser_view_layout.h

Index: chrome/browser/ui/views/frame/browser_view_layout.h
diff --git a/chrome/browser/ui/views/frame/browser_view_layout.h b/chrome/browser/ui/views/frame/browser_view_layout.h
index 1febcdd6f6d73b338636bc72667c6f0c9ad67660..0f4eb35e1322a29570c9322651f74cde2979f4ab 100644
--- a/chrome/browser/ui/views/frame/browser_view_layout.h
+++ b/chrome/browser/ui/views/frame/browser_view_layout.h
@@ -38,9 +38,6 @@ class WebContentsModalDialogHost;
 // The layout manager used in chrome browser.
 class BrowserViewLayout : public views::LayoutManager {
  public:
-  // The vertical overlap between the TabStrip and the Toolbar.
-  static const int kToolbarTabStripVerticalOverlap;
-
   BrowserViewLayout();
   ~BrowserViewLayout() override;