Allow floating point rectangles to be sent via IPC.

content/public/common/common_param_traits.h

Index: content/public/common/common_param_traits.h
diff --git a/content/public/common/common_param_traits.h b/content/public/common/common_param_traits.h
index 8d79891a3088fb7fb3882f00a264b367826b6ead..df0ddc3a6521e3e32e82cebe9c68ba75d50535e0 100644
--- a/content/public/common/common_param_traits.h
+++ b/content/public/common/common_param_traits.h
@@ -33,6 +33,7 @@ struct Referrer;
 namespace gfx {
 class Point;
 class Rect;
+class RectF;
 class Size;
 }  // namespace gfx
 
@@ -129,6 +130,14 @@ struct CONTENT_EXPORT ParamTraits<gfx::Rect> {
 };
 
 template <>
+struct CONTENT_EXPORT ParamTraits<gfx::RectF> {
+  typedef gfx::RectF param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
 struct ParamTraits<gfx::NativeWindow> {
   typedef gfx::NativeWindow param_type;
   static void Write(Message* m, const param_type& p) {