Add builders for tracing event's structural arguments

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 3af2102152098df6b4890f1446061cc26ee4a9b8..4301add40c2e52b29aba980ce13150124824c653 100644
--- a/cc/base/math_util.h
+++ b/cc/base/math_util.h
@@ -17,7 +17,12 @@
 #include "ui/gfx/size.h"
 #include "ui/gfx/transform.h"
 
-namespace base { class Value; }
+namespace base {
+class Value;
+namespace debug {
+class TracedValue;
+}
+}
 
 namespace gfx {
 class QuadF;
@@ -174,21 +179,35 @@ class CC_EXPORT MathUtil {
 
   // Conversion to value.
   static scoped_ptr<base::Value> AsValue(const gfx::Size& s);
-  static scoped_ptr<base::Value> AsValue(const gfx::SizeF& s);
   static scoped_ptr<base::Value> AsValue(const gfx::Rect& r);
   static bool FromValue(const base::Value*, gfx::Rect* out_rect);
   static scoped_ptr<base::Value> AsValue(const gfx::PointF& q);
-  static scoped_ptr<base::Value> AsValue(const gfx::Point3F&);
-  static scoped_ptr<base::Value> AsValue(const gfx::Vector2d& v);
-  static scoped_ptr<base::Value> AsValue(const gfx::QuadF& q);
-  static scoped_ptr<base::Value> AsValue(const gfx::RectF& rect);
-  static scoped_ptr<base::Value> AsValue(const gfx::Transform& transform);
-  static scoped_ptr<base::Value> AsValue(const gfx::BoxF& box);
+
+  static void AddToTracedValue(const gfx::Size& s,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::SizeF& s,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::Rect& r,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::PointF& q,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::Point3F&,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::Vector2d& v,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::QuadF& q,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::RectF& rect,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::Transform& transform,
+                               base::debug::TracedValue* res);
+  static void AddToTracedValue(const gfx::BoxF& box,
+                               base::debug::TracedValue* res);
 
   // Returns a base::Value representation of the floating point value.
   // If the value is inf, returns max double/float representation.
-  static scoped_ptr<base::Value> AsValueSafely(double value);
-  static scoped_ptr<base::Value> AsValueSafely(float value);
+  static double AsDoubleSafely(double value);
+  static float AsFloatSafely(float value);
 };
 
 }  // namespace cc