Add impl/comp scrolling instrumentation.

cc/base/math_util.cc

Index: cc/base/math_util.cc
diff --git a/cc/base/math_util.cc b/cc/base/math_util.cc
index 39a183e27dbb35ffaef05f704f1dd821d33fb1ef..b9e715612fca9c6866dd62e274c5139da9e7848f 100644
--- a/cc/base/math_util.cc
+++ b/cc/base/math_util.cc
@@ -14,6 +14,7 @@
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/rect_f.h"
 #include "ui/gfx/transform.h"
+#include "ui/gfx/vector2d.h"
 #include "ui/gfx/vector2d_f.h"
 
 namespace cc {
@@ -496,6 +497,20 @@ scoped_ptr<base::Value> MathUtil::AsValue(gfx::Rect r) {
   return res.PassAs<base::Value>();
 }
 
+scoped_ptr<base::Value> MathUtil::AsValue(gfx::Vector2d vec) {
+  scoped_ptr<base::ListValue> res(new base::ListValue());
+  res->AppendInteger(vec.x());
+  res->AppendInteger(vec.y());
+  return res.PassAs<base::Value>();
+}
+
+scoped_ptr<base::Value> MathUtil::AsValue(gfx::Vector2dF vec) {
+  scoped_ptr<base::ListValue> res(new base::ListValue());
+  res->AppendDouble(vec.x());
+  res->AppendDouble(vec.y());
+  return res.PassAs<base::Value>();
+}
+
 bool MathUtil::FromValue(const base::Value* raw_value, gfx::Rect* out_rect) {
   const base::ListValue* value = NULL;
   if (!raw_value->GetAsList(&value))