harmony: partly harmonize permissions bubble

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

Index: chrome/browser/ui/views/harmony/layout_delegate.h
diff --git a/chrome/browser/ui/views/harmony/layout_delegate.h b/chrome/browser/ui/views/harmony/layout_delegate.h
index c20092fd3dded96ce7fe4d6273138d7409aaac23..8e6938c4b7ce29d3f186ee11ca0e089e897794b4 100644
--- a/chrome/browser/ui/views/harmony/layout_delegate.h
+++ b/chrome/browser/ui/views/harmony/layout_delegate.h
@@ -30,8 +30,11 @@ class LayoutDelegate {
     // Horizontal spacing between the edge of the window and the
     // left or right of a button.
     BUTTON_VEDGE_MARGIN_NEW,
-    // Indent of checkboxes relative to related text.
-    CHECKBOX_INDENT,
+    // Indent of subsections (related checkboxes or similar)  relative to
+    // related text.
+    SUBSECTION_INDENT,

[Peter Kasting, 2017/02/01 02:20:20]

I liked your use of SUBSECTION here, so I adopted it in
https://codereview.chromium.org/2666043002/ .  I added HORIZONTAL_ there as
well.  Once that change lands (in CQ as I write this), you'll want to revert
this piece of this change, and update the rest of your patch to use that name.

+    // Horizontal spacing between a control and its label.
+    ITEM_LABEL_SPACING,

[Peter Kasting, 2017/02/01 02:20:20]

I also found a need for this constant locally, so adding this seems good.  In my
checkout (not yet up for review), I picked this name and comment, for
parallelism with the other names above (and I put this in alphabetical order
with them).  WDYT?

    // Horizontal spacing between an item such as an icon or checkbox and a
    // label related to it.
    RELATED_LABEL_HORIZONTAL_SPACING,

   };
 
   enum class DialogWidthType {