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

Source/platform/transforms/RotateTransformOperation.h

Index: Source/platform/transforms/RotateTransformOperation.h
diff --git a/Source/platform/transforms/RotateTransformOperation.h b/Source/platform/transforms/RotateTransformOperation.h
index 83cd81234706c1e392a9975353734f664ee7945b..2ffe48f8f0c82beb6f71ad0e4e308476e60e81ab 100644
--- a/Source/platform/transforms/RotateTransformOperation.h
+++ b/Source/platform/transforms/RotateTransformOperation.h
@@ -46,11 +46,16 @@ public:
     double z() const { return m_z; }
     double angle() const { return m_angle; }
 
-private:
-    virtual bool isIdentity() const OVERRIDE { return !m_angle; }
+    bool hasZeroAxis() const;

[Ian Vollick, 2014/06/17 15:54:56]

nit: now that you've got ::axis() below, maybe we could just use
axis().isZero()?

[awoloszyn, 2014/06/17 20:06:02]

Done.

+    FloatPoint3D axis() const;
+    static bool shareSameAxis(const RotateTransformOperation* fromRotation, const RotateTransformOperation* toRotation, FloatPoint3D* axis, double* fromAngle, double* toAngle);
 
+    virtual bool canInterpolateWith(const TransformOperation& other) const;
     virtual OperationType type() const OVERRIDE { return m_type; }
 
+private:
+    virtual bool isIdentity() const OVERRIDE { return !m_angle; }
+
     virtual bool operator==(const TransformOperation& o) const OVERRIDE
     {
         if (!isSameType(o))