Adding Blink-side 3d Box and Bounds calculations to TransformOperations

Source/platform/transforms/TransformationMatrix.h

Index: Source/platform/transforms/TransformationMatrix.h
diff --git a/Source/platform/transforms/TransformationMatrix.h b/Source/platform/transforms/TransformationMatrix.h
index fe06f4114b825935ff757dcc84fcd364c82e9504..654df9f52951907b0b42b696c4a1e49710eb8863 100644
--- a/Source/platform/transforms/TransformationMatrix.h
+++ b/Source/platform/transforms/TransformationMatrix.h
@@ -41,7 +41,7 @@ class IntRect;
 class LayoutRect;
 class FloatRect;
 class FloatQuad;
-
+class FloatBox;
 #if CPU(X86_64)
 #define TRANSFORMATION_MATRIX_USE_X86_64_SSE2
 #endif
@@ -152,6 +152,8 @@ public:
     // while sanitizing values created when the w component is negative.
     LayoutRect clampedBoundsOfProjectedQuad(const FloatQuad&) const;
 
+    void transformBox(FloatBox&) const;
+
     double m11() const { return m_matrix[0][0]; }
     void setM11(double f) { m_matrix[0][0] = f; }
     double m12() const { return m_matrix[0][1]; }