Move implementation of WebFilterOperations into cc

cc/output/filter_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_OUTPUT_FILTER_OPERATIONS_H_
+#define CC_OUTPUT_FILTER_OPERATIONS_H_
+
+#include <vector>
+
+#include "base/logging.h"
+#include "cc/output/filter_operation.h"
+
+namespace cc {
+
+// An ordered list of filter operations.
+class CC_EXPORT FilterOperations {
+ public:
+  FilterOperations();
+
+  FilterOperations(const FilterOperations& other);
+
+  ~FilterOperations();
+
+  FilterOperations& operator=(const FilterOperations& other);
+
+  bool operator==(const FilterOperations& other) const;
+
+  bool operator!=(const FilterOperations& other) const {
+    return !(*this == other);
+  }
+
+  void Append(const FilterOperation& filter);
+
+  // Removes all filter operations.
+  void Clear();
+
+  bool IsEmpty() const;
+
+  void GetOutsets(int* top, int* right, int* bottom, int* left) const;
+  bool HasFilterThatMovesPixels() const;
+  bool HasFilterThatAffectsOpacity() const;
+
+  size_t size() const {
+    return operations_.size();
+  }
+
+  FilterOperation at(size_t index) const {
+    DCHECK_LT(index, size());
+    return operations_[index];
+  }
+
+ private:
+  std::vector<FilterOperation> operations_;
+};
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_FILTER_OPERATIONS_H_