Blink Compositor: Erase virtuals on Transform and Filter operations.

cc/animation/transform_operations.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_ANIMATION_TRANSFORM_OPERATIONS_H_
 #define CC_ANIMATION_TRANSFORM_OPERATIONS_H_
 
 #include <vector>
 
+#include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/animation/transform_operation.h"
 #include "cc/base/cc_export.h"
 #include "ui/gfx/transform.h"
 
 namespace gfx {
 class BoxF;
 struct DecomposedTransform;
 }
@@ skipping 63 matching lines @@
 
   void AppendTranslate(SkMScalar x, SkMScalar y, SkMScalar z);
   void AppendRotate(SkMScalar x, SkMScalar y, SkMScalar z, SkMScalar degrees);
   void AppendScale(SkMScalar x, SkMScalar y, SkMScalar z);
   void AppendSkew(SkMScalar x, SkMScalar y);
   void AppendPerspective(SkMScalar depth);
   void AppendMatrix(const gfx::Transform& matrix);
   void AppendIdentity();
   bool IsIdentity() const;
 
+  size_t size() const { return operations_.size(); }
+
+  const TransformOperation& at(size_t index) const {
+    DCHECK_LT(index, size());
+    return operations_[index];
+  }
+
  private:
   bool BlendInternal(const TransformOperations& from,
                      SkMScalar progress,
                      gfx::Transform* result) const;
 
   std::vector<TransformOperation> operations_;
 
   bool ComputeDecomposedTransform() const;
 
   // For efficiency, we cache the decomposed transform.
   mutable scoped_ptr<gfx::DecomposedTransform> decomposed_transform_;
   mutable bool decomposed_transform_dirty_;
 
   DISALLOW_ASSIGN(TransformOperations);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_TRANSFORM_OPERATIONS_H_