Fix gcc 4.7 building problems.

content/browser/renderer_host/render_widget_host_view_gtk.cc

Index: content/browser/renderer_host/render_widget_host_view_gtk.cc
===================================================================
--- content/browser/renderer_host/render_widget_host_view_gtk.cc	(revision 141258)
+++ content/browser/renderer_host/render_widget_host_view_gtk.cc	(working copy)
@@ -82,10 +82,10 @@
   if (!moz_spinning_cursor) {
     const GdkColor fg = { 0, 0, 0, 0 };
     const GdkColor bg = { 65535, 65535, 65535, 65535 };
-    GdkPixmap* source =
-        gdk_bitmap_create_from_data(NULL, moz_spinning_bits, 32, 32);
-    GdkPixmap* mask =
-        gdk_bitmap_create_from_data(NULL, moz_spinning_mask_bits, 32, 32);
+    GdkPixmap* source = gdk_bitmap_create_from_data(
+        NULL, reinterpret_cast<const gchar*>(moz_spinning_bits), 32, 32);
+    GdkPixmap* mask = gdk_bitmap_create_from_data(
+        NULL, reinterpret_cast<const gchar*>(moz_spinning_mask_bits), 32, 32);
     moz_spinning_cursor =
         gdk_cursor_new_from_pixmap(source, mask, &fg, &bg, 2, 2);
     g_object_unref(source);