[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

content/common/common_param_traits.h

Index: content/common/common_param_traits.h
diff --git a/content/common/common_param_traits.h b/content/common/common_param_traits.h
index ae102cb6d635f6825636c3bc642d01778b0b9b62..41e0326bf616c15395b6e5fafaaff14c62f58c4c 100644
--- a/content/common/common_param_traits.h
+++ b/content/common/common_param_traits.h
@@ -38,6 +38,10 @@ class HostPortPair;
 class UploadData;
 }
 
+namespace ui {
+class Range;
+}
+
 namespace IPC {
 
 template <>
@@ -165,6 +169,14 @@ struct ParamTraits<gfx::NativeWindow> {
   }
 };
 
+template <>
+struct ParamTraits<ui::Range> {
+  typedef ui::Range param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 #if defined(OS_WIN)
 template<>
 struct ParamTraits<TransportDIB::Id> {