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

Source/platform/transforms/InterpolatedTransformOperation.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 namespace WebCore {
 
 // This class is an implementation detail for deferred interpolations.
 class PLATFORM_EXPORT InterpolatedTransformOperation : public TransformOperation {
 public:
     static PassRefPtr<InterpolatedTransformOperation> create(const TransformOperations& from, const TransformOperations& to, double progress)
     {
         return adoptRef(new InterpolatedTransformOperation(from, to, progress));
     }
 
+    virtual bool canBlendWith(const TransformOperation& other) const
+    {
+        return isSameType(other);
+    }
+
 private:
     virtual bool isIdentity() const OVERRIDE { return false; }
 
     virtual OperationType type() const OVERRIDE { return Interpolated; }
 
     virtual bool operator==(const TransformOperation&) const OVERRIDE;
     virtual void apply(TransformationMatrix&, const FloatSize& borderBoxSize) const OVERRIDE;
 
     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) OVERRIDE;
 
@@ skipping 10 matching lines @@
 
     const TransformOperations from;
     const TransformOperations to;
     double progress;
 };
 
 } // namespace WebCore
 
 #endif // InterpolatedTransformOperation_h