Menu theme tuning.

src/platform/theme/resources/gtkrc

 gtk_color_scheme = "fg_color:#000\nbg_color:#F7F7F7\nbase_color:#F7F7F7\ntext_color:#000\nselected_bg_color:#000\nselected_fg_color:#000\ntooltip_bg_color:#F7F7F7\ntooltip_fg_color:#000\n"
 
 gtk-font-name="DroidSans 9"
 
 # Disable button images.
 gtk-button-images = 0
 
 # Diable mnemonics for labels and menu items.
 gtk-enable-mnemonics = 0
 
@@ skipping 53 matching lines @@
 
   GtkHScale::slider-width = 16
 
   # Tweak the width of scrollbars slightly. This results in an overall width of
   # 15 vs 16 stock.
   GtkScrollbar::slider-width = 13
 
   # Give more padding to buttons (default is 1, 1, 1, 1).
   GtkButton::inner-border = { 5, 5, 1, 1 }
 
+  # Turn off extra menu vertical padding
+  GtkMenu::vertical-padding = 0
+
   engine "theme" { }
 }
 
 style "NotebookStyle" = "default" {
   # How much tabs shift when selected is dictated by the xthickness. Ideally we
   # would set this to 0 as we don't want a shift, but this is also used for the
   # padding around the children of the tab, so that if we set the thickenss to
   # 0 there is no padding around the children of the tab and they draw over the
   # border.
   xthickness = 1
   ythickness = 1
 
   # This gives an extra border around each tab (notebook page) so that we can
   # draw the border in. We have to do this as we set the x/ythickness to 1.
   GtkNotebook::focus-line-width = 1
 
   # We don't want tabs to overlap.
   GtkNotebook::tab_overlap = 0
 
   # Padding for tabs.
   GtkNotebook::tab-curvature = 10
 }
 
-style "WhiteBackgroundStyle" = "default" {
-  bg[NORMAL]        = "#FFF"
-  bg[PRELIGHT]      = "#FFF"
-  bg[SELECTED]      = "#FFF"
-  bg[INSENSITIVE]   = "#FFF"
-  bg[ACTIVE]        = "#FFF"
-}
-
 style "TextStyle" = "default" {
   base[SELECTED]      = "#DCE4FA"
 }
 
 style "TooltipStyle" = "default" {
   # Padding to allow a rounded rect border.
   xthickness = 10
 
   # Padding to give more space at top and bottom.
   ythickness = 6
 
   # Yellowish background.
   bg[NORMAL] = "#FFF9E3"
 
   # Give tooltips a slightly smaller font.
   font_name = "DroidSans 8"
 }
 
+style "WhiteBackgroundStyle" = "default" {
+  bg[NORMAL]        = "#FFF"
+  bg[PRELIGHT]      = "#FFF"
+  bg[SELECTED]      = "#FFF"
+  bg[INSENSITIVE]   = "#FFF"
+  bg[ACTIVE]        = "#FFF"
+}
+
 class "*" style "default"
 
 class "GtkNotebook" style "NotebookStyle"
 
 class "GtkEntry" style "TextStyle"
 
 class "GtkViewsEntry" style "TextStyle"
 
 class "GtkTextView" style "TextStyle"
 
 widget "gtk-tooltip*" style "TooltipStyle"
 
 widget "*.chromeos-options-tab" style "WhiteBackgroundStyle"
 
 widget "*.chromeos-options-tab*.GtkEventBox" style "WhiteBackgroundStyle"