Clamp PerformanceResource and PerformanceTiming to 5us.

third_party/WebKit/Source/core/timing/PerformanceResourceTiming.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 14 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/timing/PerformanceResourceTiming.h"
 
+#include "core/timing/PerformanceBase.h"
 #include "platform/network/ResourceRequest.h"
 #include "platform/network/ResourceResponse.h"
 #include "platform/network/ResourceTimingInfo.h"
 
 namespace blink {
 
 static double monotonicTimeToDOMHighResTimeStamp(double timeOrigin, double seconds)
 {
     ASSERT(seconds >= 0.0);
     if (!seconds)
         return 0.0;
-    return (seconds - timeOrigin) * 1000.0;
+    return PerformanceBase::clampTimeResolution(seconds - timeOrigin) * 1000.0;
 }
 
 PerformanceResourceTiming::PerformanceResourceTiming(const ResourceTimingInfo& info, double timeOrigin, double startTime, double lastRedirectEndTime, bool allowTimingDetails, bool allowRedirectDetails)
     : PerformanceEntry(info.initialRequest().url().string(), "resource", monotonicTimeToDOMHighResTimeStamp(timeOrigin, startTime), monotonicTimeToDOMHighResTimeStamp(timeOrigin, info.loadFinishTime()))
     , m_initiatorType(info.initiatorType())
     , m_timeOrigin(timeOrigin)
     , m_timing(info.finalResponse().resourceLoadTiming())
     , m_lastRedirectEndTime(lastRedirectEndTime)
     , m_finishTime(info.loadFinishTime())
     , m_didReuseConnection(info.finalResponse().connectionReused())
@@ skipping 148 matching lines @@
 
 double PerformanceResourceTiming::responseEnd() const
 {
     if (!m_finishTime)
         return responseStart();
 
     return monotonicTimeToDOMHighResTimeStamp(m_timeOrigin, m_finishTime);
 }
 
 } // namespace blink