COMPMID-358 Implement OpenCL ROI Pooling

* Implement OpenCL ROI Pooling
* Add CLROIPoolingLayer benchmarks

Change-Id: I8786d01d551850a1b4d599a48fabe3925e0a27d0
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/79833
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/tests/IArrayAccessor.h b/tests/IArrayAccessor.h
new file mode 100644
index 0000000..73f8829
--- /dev/null
+++ b/tests/IArrayAccessor.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_TEST_IARRAYACCESSOR_H__
+#define __ARM_COMPUTE_TEST_IARRAYACCESSOR_H__
+
+namespace arm_compute
+{
+namespace test
+{
+/** Common interface to provide information and access to array like
+ * structures.
+ */
+template <typename T>
+class IArrayAccessor
+{
+public:
+    using value_type = T;
+
+    /** Virtual destructor. */
+    virtual ~IArrayAccessor() = default;
+
+    /** Number of elements of the tensor. */
+    virtual int num_values() const = 0;
+
+    /** Access to the buffer.
+     *
+     * @return A pointer to the first element in the buffer.
+     */
+    virtual T *buffer() = 0;
+
+    /** Resize array.
+     *
+     *  @param[in] num The new array size in number of elements
+     */
+    virtual void resize(size_t num) = 0;
+};
+} // namespace test
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_TEST_IARRAYACCESSOR_H__ */