Add Vector2d classes that represent offsets, instead of using Point.

content/public/common/common_param_traits.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/public/common/common_param_traits.h"
 
 #include "content/public/common/content_constants.h"
 #include "content/public/common/referrer.h"
 #include "net/base/host_port_pair.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ skipping 133 matching lines @@
     return false;
   r->set_width(w);
   r->set_height(h);
   return true;
 }
 
 void ParamTraits<gfx::Size>::Log(const gfx::Size& p, std::string* l) {
   l->append(base::StringPrintf("(%d, %d)", p.width(), p.height()));
 }
 
+void ParamTraits<gfx::Vector2d>::Write(Message* m, const gfx::Vector2d& v) {
+  m->WriteInt(v.x());
+  m->WriteInt(v.y());
+}
+
+bool ParamTraits<gfx::Vector2d>::Read(const Message* m, PickleIterator* iter,
+                                   gfx::Vector2d* r) {
+  int x, y;
+  if (!m->ReadInt(iter, &x) ||
+      !m->ReadInt(iter, &y))
+    return false;
+  r->set_x(x);
+  r->set_y(y);
+  return true;
+}
+
+void ParamTraits<gfx::Vector2d>::Log(const gfx::Vector2d& v, std::string* l) {
+  l->append(base::StringPrintf("(%d, %d)", v.x(), v.y()));
+}
+
 void ParamTraits<gfx::Rect>::Write(Message* m, const gfx::Rect& p) {
   m->WriteInt(p.x());
   m->WriteInt(p.y());
   m->WriteInt(p.width());
   m->WriteInt(p.height());
 }
 
 bool ParamTraits<gfx::Rect>::Read(const Message* m,
                                   PickleIterator* iter,
                                   gfx::Rect* r) {
@@ skipping 99 matching lines @@
 #undef CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_MACROS_H_
 #include "content/public/common/common_param_traits_macros.h"
 }  // namespace IPC
 
 // Generate param traits log methods.
 #include "ipc/param_traits_log_macros.h"
 namespace IPC {
 #undef CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_MACROS_H_
 #include "content/public/common/common_param_traits_macros.h"
 }  // namespace IPC