Change tooltip corner radius to 4px.

theme_draw.cc

 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <cairo.h>
 #include <math.h>
 #include <gmodule.h>
 #include <gtk/gtk.h>
 #include <string.h>
@@ skipping 228 matching lines @@
 static const int TOOLTIP_SHADOW_DEPTH = 2;
 
 // Tooltip shadow color.
 static const double TOOLTIP_SHADOW_R = 0;
 static const double TOOLTIP_SHADOW_G = 0;
 static const double TOOLTIP_SHADOW_B = 0;
 
 // Alpha for shadow pixels, from outer-most to inner-most.
 static const double TOOLTIP_SHADOW_ALPHAS[] = { 0.1, 0.2 };
 
-// Outermost shadow corner radius is 10 pixel tooltip border corner radius
+// Outermost shadow corner radius is 4-pixel tooltip border corner radius
 // plus TOOLTIP_SHADOW_DEPTH.
-static const int TOOLTIP_CORNER_RADIUS = 10 + TOOLTIP_SHADOW_DEPTH;
+static const int TOOLTIP_CORNER_RADIUS = 4 + TOOLTIP_SHADOW_DEPTH;
 
 // Widget name of GtkCombBox popup menu.
 static const char* kGtkComboBoxPopupMenu = "gtk-combobox-popup-menu";
 
 // Widget name of ChromeOS options tab.
 static const char* kChromeOsOptionsTabName = "chromeos-options-tab";
 
 // Check whether given widget's name is the same as name_to_check.
 static bool WidgetHasName(GtkWidget* widget, const char* name_to_check) {
   const char* widget_name = gtk_widget_get_name(widget);
@@ skipping 1268 matching lines @@
                     GtkStateType state_type,
                     GdkRectangle* area,
                     GtkWidget* widget,
                     const gchar* detail,
                     gint y1,
                     gint y2,
                     gint x) {
   // We currently don't have any vertical separators. If we do need them, be
   // sure and special case so that we don't draw the separator for comboboxs:
 }