Delete panel metrics and define insets in terms of distance metrics.

chrome/browser/ui/views/harmony/chrome_layout_provider.h

Index: chrome/browser/ui/views/harmony/chrome_layout_provider.h
diff --git a/chrome/browser/ui/views/harmony/chrome_layout_provider.h b/chrome/browser/ui/views/harmony/chrome_layout_provider.h
index 18be5ffbca83a4b79fa73b6a050a50e145a10a00..dd264ee844dfb5d0b3d130cb996942497e7997a4 100644
--- a/chrome/browser/ui/views/harmony/chrome_layout_provider.h
+++ b/chrome/browser/ui/views/harmony/chrome_layout_provider.h
@@ -17,14 +17,8 @@ enum ChromeDistanceMetric {
   DISTANCE_BUTTON_MINIMUM_WIDTH = views::VIEWS_DISTANCE_END,
   // Vertical spacing between a list of multiple controls in one column.
   DISTANCE_CONTROL_LIST_VERTICAL,
-  // Margin between the edge of a dialog and the left, right, or bottom of a
-  // contained button.
-  DISTANCE_DIALOG_BUTTON_MARGIN,
   // Spacing between a dialog button and the content above it.
   DISTANCE_DIALOG_BUTTON_TOP,
-  // Horizontal or vertical margin between the edge of a panel and the
-  // contained content.
-  DISTANCE_PANEL_CONTENT_MARGIN,
   // Smaller horizontal spacing between other controls that are logically
   // related.
   DISTANCE_RELATED_CONTROL_HORIZONTAL_SMALL,