Add cc::SurfaceInfo::is_valid()

cc/ipc/cc_param_traits.cc

Index: cc/ipc/cc_param_traits.cc
diff --git a/cc/ipc/cc_param_traits.cc b/cc/ipc/cc_param_traits.cc
index 40066124e7cabdc2e78ea2af056f178b1857f379..216af8f2d148f31d6fc6031c06b52b4583ae26ba 100644
--- a/cc/ipc/cc_param_traits.cc
+++ b/cc/ipc/cc_param_traits.cc
@@ -718,6 +718,48 @@ void ParamTraits<cc::SurfaceId>::Log(const param_type& p, std::string* l) {
   l->append(")");
 }
 
+void ParamTraits<cc::SurfaceInfo>::GetSize(base::PickleSizer* s,
+                                           const param_type& p) {
+  GetParamSize(s, p.id());
+  GetParamSize(s, p.device_scale_factor());
+  GetParamSize(s, p.size_in_pixels());
+}
+
+void ParamTraits<cc::SurfaceInfo>::Write(base::Pickle* m, const param_type& p) {
+  WriteParam(m, p.id());
+  WriteParam(m, p.device_scale_factor());
+  WriteParam(m, p.size_in_pixels());
+}
+
+bool ParamTraits<cc::SurfaceInfo>::Read(const base::Pickle* m,
+                                        base::PickleIterator* iter,
+                                        param_type* p) {
+  cc::SurfaceId surface_id;
+  if (!ReadParam(m, iter, &surface_id))
+    return false;
+
+  float device_scale_factor;
+  if (!ReadParam(m, iter, &device_scale_factor))
+    return false;
+
+  gfx::Size size_in_pixels;
+  if (!ReadParam(m, iter, &size_in_pixels))
+    return false;
+
+  *p = cc::SurfaceInfo(surface_id, device_scale_factor, size_in_pixels);
+  return p->is_valid();
+}
+
+void ParamTraits<cc::SurfaceInfo>::Log(const param_type& p, std::string* l) {
+  l->append("SurfaceInfo(");
+  LogParam(p.id(), l);
+  l->append(", ");
+  LogParam(p.device_scale_factor(), l);
+  l->append(", ");
+  LogParam(p.size_in_pixels(), l);
+  l->append(")");
+}
+
 void ParamTraits<cc::CompositorFrame>::Write(base::Pickle* m,
                                              const param_type& p) {
   WriteParam(m, p.metadata);