Convert //cc from scoped_ptr to std::unique_ptr.

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 c596348a0b740934a76be47445542c7792fe2ead..4e3347e3935cb0c70e1c7ff850174bbe712a9484 100644
--- a/cc/base/math_util.h
+++ b/cc/base/math_util.h
@@ -7,10 +7,10 @@
 
 #include <algorithm>
 #include <cmath>
+#include <memory>
 #include <vector>
 
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "ui/gfx/geometry/box_f.h"
 #include "ui/gfx/geometry/point3_f.h"
@@ -254,10 +254,10 @@ class CC_EXPORT MathUtil {
                                       const gfx::Vector2dF& destination);
 
   // Conversion to value.
-  static scoped_ptr<base::Value> AsValue(const gfx::Size& s);
-  static scoped_ptr<base::Value> AsValue(const gfx::Rect& r);
+  static std::unique_ptr<base::Value> AsValue(const gfx::Size& s);
+  static std::unique_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 std::unique_ptr<base::Value> AsValue(const gfx::PointF& q);
 
   static void AddToTracedValue(const char* name,
                                const gfx::Size& s,