new files for pathops geometric intersection

src/pathops/SkOpTAllocator.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef SkOpTAllocator_DEFINED
+#define SkOpTAllocator_DEFINED
+
+#include "SkChunkAlloc.h"
+
+// T is SkOpAngle2, SkOpSpan2, or SkOpSegment2
+template<typename T>
+class SkOpTAllocator {
+public:
+    static T* Allocate(SkChunkAlloc* allocator) {
+        void* ptr = allocator->allocThrow(sizeof(T));
+        T* record = (T*) ptr;
+        return record;
+    }
+
+    static T* New(SkChunkAlloc* allocator) {
+        return new (Allocate(allocator)) T();
+    }
+};
+
+#endif