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}

modules/rtp_rtcp/include/rtp_header_extension_map.h

@@ -0,0 +1,80 @@
+/*
+ *  Copyright (c) 2012 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_MODULES_RTP_RTCP_INCLUDE_RTP_HEADER_EXTENSION_MAP_H_
+#define WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_HEADER_EXTENSION_MAP_H_
+
+#include <string>
+
+#include "webrtc/api/array_view.h"
+#include "webrtc/api/rtpparameters.h"
+#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
+#include "webrtc/rtc_base/basictypes.h"
+#include "webrtc/rtc_base/checks.h"
+
+namespace webrtc {
+
+struct RtpExtensionSize {
+  RTPExtensionType type;
+  uint8_t value_size;
+};
+
+class RtpHeaderExtensionMap {
+ public:
+  static constexpr RTPExtensionType kInvalidType = kRtpExtensionNone;
+  static constexpr int kInvalidId = 0;
+
+  RtpHeaderExtensionMap();
+  explicit RtpHeaderExtensionMap(rtc::ArrayView<const RtpExtension> extensions);
+
+  template <typename Extension>
+  bool Register(int id) {
+    return Register(id, Extension::kId, Extension::kUri);
+  }
+  bool RegisterByType(int id, RTPExtensionType type);
+  bool RegisterByUri(int id, const std::string& uri);
+
+  bool IsRegistered(RTPExtensionType type) const {
+    return GetId(type) != kInvalidId;
+  }
+  // Return kInvalidType if not found.
+  RTPExtensionType GetType(int id) const {
+    RTC_DCHECK_GE(id, kMinId);
+    RTC_DCHECK_LE(id, kMaxId);
+    return types_[id];
+  }
+  // Return kInvalidId if not found.
+  uint8_t GetId(RTPExtensionType type) const {
+    RTC_DCHECK_GT(type, kRtpExtensionNone);
+    RTC_DCHECK_LT(type, kRtpExtensionNumberOfExtensions);
+    return ids_[type];
+  }
+
+  size_t GetTotalLengthInBytes(
+      rtc::ArrayView<const RtpExtensionSize> extensions) const;
+
+  // TODO(danilchap): Remove use of the functions below.
+  int32_t Register(RTPExtensionType type, int id) {
+    return RegisterByType(id, type) ? 0 : -1;
+  }
+  int32_t Deregister(RTPExtensionType type);
+
+ private:
+  static constexpr int kMinId = 1;
+  static constexpr int kMaxId = 14;
+  bool Register(int id, RTPExtensionType type, const char* uri);
+
+  RTPExtensionType types_[kMaxId + 1];
+  uint8_t ids_[kRtpExtensionNumberOfExtensions];
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_HEADER_EXTENSION_MAP_H_