Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

system_wrappers/include/aligned_array.h

@@ -0,0 +1,86 @@
+/*
+ *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_
+#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_
+
+#include "webrtc/rtc_base/checks.h"
+#include "webrtc/system_wrappers/include/aligned_malloc.h"
+
+namespace webrtc {
+
+// Wrapper class for aligned arrays. Every row (and the first dimension) are
+// aligned to the given byte alignment.
+template<typename T> class AlignedArray {
+ public:
+  AlignedArray(size_t rows, size_t cols, size_t alignment)
+      : rows_(rows),
+        cols_(cols) {
+    RTC_CHECK_GT(alignment, 0);
+    head_row_ = static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_),
+                                               alignment));
+    for (size_t i = 0; i < rows_; ++i) {
+      head_row_[i] = static_cast<T*>(AlignedMalloc(cols_ * sizeof(**head_row_),
+                                                   alignment));
+    }
+  }
+
+  ~AlignedArray() {
+    for (size_t i = 0; i < rows_; ++i) {
+      AlignedFree(head_row_[i]);
+    }
+    AlignedFree(head_row_);
+  }
+
+  T* const* Array() {
+    return head_row_;
+  }
+
+  const T* const* Array() const {
+    return head_row_;
+  }
+
+  T* Row(size_t row) {
+    RTC_CHECK_LE(row, rows_);
+    return head_row_[row];
+  }
+
+  const T* Row(size_t row) const {
+    RTC_CHECK_LE(row, rows_);
+    return head_row_[row];
+  }
+
+  T& At(size_t row, size_t col) {
+    RTC_CHECK_LE(col, cols_);
+    return Row(row)[col];
+  }
+
+  const T& At(size_t row, size_t col) const {
+    RTC_CHECK_LE(col, cols_);
+    return Row(row)[col];
+  }
+
+  size_t rows() const {
+    return rows_;
+  }
+
+  size_t cols() const {
+    return cols_;
+  }
+
+ private:
+  size_t rows_;
+  size_t cols_;
+  T** head_row_;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_