WebRTCStatsReport::copyHandle and getStats added

third_party/WebKit/public/platform/WebRTCStats.h

 // Copyright 2016 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 WebRTCStats_h
 #define WebRTCStats_h
 
 #include "WebCommon.h"
 #include "WebString.h"
 #include "WebVector.h"
@@ skipping 19 matching lines @@
     WebRTCStatsMemberTypeSequenceUint32, // WebVector<uint32_t>
     WebRTCStatsMemberTypeSequenceInt64, // WebVector<int64_t>
     WebRTCStatsMemberTypeSequenceUint64, // WebVector<uint64_t>
     WebRTCStatsMemberTypeSequenceDouble, // WebVector<double>
     WebRTCStatsMemberTypeSequenceString, // WebVector<WebString>
 };
 
 class WebRTCStatsReport {
 public:
     virtual ~WebRTCStatsReport() {}
+    // Creates a new report object that is a handle to the same underlying stats
+    // report (the stats are not copied). The new report's iterator is reset,
+    // useful when needing multiple iterators.
+    virtual std::unique_ptr<WebRTCStatsReport> copyHandle() const = 0;
 
+    // Gets stats object by |id|, or null if no stats with that |id| exists.

[foolip, 2016/09/22 12:44:58]

Not actually null, but maybe "std::unique_ptr<> where get() returns null" is a
bit much :)

+    virtual std::unique_ptr<WebRTCStats> getStats(WebString id) const = 0;
     // The next stats object, or null if the end has been reached.
     virtual std::unique_ptr<WebRTCStats> next() = 0;
 };
 
 class WebRTCStats {
 public:
     virtual ~WebRTCStats() {}
 
     virtual WebString id() const = 0;
     virtual WebString type() const = 0;
@@ skipping 21 matching lines @@
     virtual WebVector<uint32_t> valueSequenceUint32() const = 0;
     virtual WebVector<int64_t> valueSequenceInt64() const = 0;
     virtual WebVector<uint64_t> valueSequenceUint64() const = 0;
     virtual WebVector<double> valueSequenceDouble() const = 0;
     virtual WebVector<WebString> valueSequenceString() const = 0;
 };
 
 } // namespace blink
 
 #endif // WebRTCStats_h