Generate param traits size methods for IPC files in content/ (and traits it depends on).

ui/gfx/ipc/gfx_param_traits.h

Index: ui/gfx/ipc/gfx_param_traits.h
diff --git a/ui/gfx/ipc/gfx_param_traits.h b/ui/gfx/ipc/gfx_param_traits.h
index 5045517fc94472ed0042d7947c45f92389493cf1..9a7a5b0d3e405af81b3b13c1ff7bb400796189bb 100644
--- a/ui/gfx/ipc/gfx_param_traits.h
+++ b/ui/gfx/ipc/gfx_param_traits.h
@@ -26,6 +26,7 @@ namespace IPC {
 template <>
 struct GFX_IPC_EXPORT ParamTraits<gfx::Range> {
   typedef gfx::Range param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
@@ -37,6 +38,7 @@ struct GFX_IPC_EXPORT ParamTraits<gfx::Range> {
 template <>
 struct GFX_IPC_EXPORT ParamTraits<gfx::ScopedRefCountedIOSurfaceMachPort> {
   typedef gfx::ScopedRefCountedIOSurfaceMachPort param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type p);
   // Note: Read() passes ownership of the Mach send right from the IPC message
   // to the ScopedRefCountedIOSurfaceMachPort. Therefore, Read() may only be