Move RendererPreferences to content/public/common and also put in the content namespace.

chrome/browser/ui/gtk/gtk_util.h

Index: chrome/browser/ui/gtk/gtk_util.h
===================================================================
--- chrome/browser/ui/gtk/gtk_util.h	(revision 108004)
+++ chrome/browser/ui/gtk/gtk_util.h	(working copy)
@@ -24,8 +24,11 @@
 class GtkThemeService;
 class GURL;
 class Profile;
-struct RendererPreferences;  // from common/renderer_preferences.h
 
+namespace content {
+struct RendererPreferences;
+}
+
 namespace event_utils {
 
 // Translates GdkEvent state into what kind of disposition they represent.
@@ -191,7 +194,7 @@
 
 // Sets (or resets) the font settings in |prefs| (used when creating new
 // renderers) based on GtkSettings (which itself comes from XSETTINGS).
-void UpdateGtkFontSettings(RendererPreferences* prefs);
+void UpdateGtkFontSettings(content::RendererPreferences* prefs);
 
 // Reverses a point in RTL mode. Used in making vectors of GdkPoints for window
 // shapes.