Add impl/comp scrolling instrumentation.

cc/base/math_util.h

Index: cc/base/math_util.h
diff --git a/cc/base/math_util.h b/cc/base/math_util.h
index 23eb20fa38af00ae19c52bc6351d92b686c1527f..1a0c2d4e7ba445165ff449fcadac47218ec99500 100644
--- a/cc/base/math_util.h
+++ b/cc/base/math_util.h
@@ -24,6 +24,7 @@ class Rect;
 class RectF;
 class Transform;
 class Vector2dF;
+class Vector2d;
 }
 
 namespace cc {
@@ -157,6 +158,8 @@ class CC_EXPORT MathUtil {
   // Conversion to value.
   static scoped_ptr<base::Value> AsValue(gfx::Size s);
   static scoped_ptr<base::Value> AsValue(gfx::Rect r);
+  static scoped_ptr<base::Value> AsValue(gfx::Vector2d vec);
+  static scoped_ptr<base::Value> AsValue(gfx::Vector2dF vec);
   static bool FromValue(const base::Value*, gfx::Rect* out_rect);
   static scoped_ptr<base::Value> AsValue(gfx::PointF q);
   static scoped_ptr<base::Value> AsValue(const gfx::QuadF& q);