Bug 1430173 - Reduce the precision of all explicit clocks to 2ms. r=baku, a=RyanVM

Backport to ESR where we don't have the ResistFingerprinting component.

MozReview-Commit-ID: 9bjycHjR3SF

--HG--
extra : transplant_source : %EA%03%21%0A%E9%3F%8E%CD%7C%D79f%96%85%96%00%5D%7F%95X

1 files changed, 13 insertions, 12 deletions

diff --git a/dom/performance/PerformanceTiming.h b/dom/performance/PerformanceTiming.h
index 0bc73fd3ff..edfac8d027 100644..100755
--- a/dom/performance/PerformanceTiming.h
+++ b/dom/performance/PerformanceTiming.h
@@ -10,6 +10,7 @@
 #include "mozilla/Attributes.h"
 #include "nsContentUtils.h"
 #include "nsDOMNavigationTiming.h"
+#include "mozilla/TimerClamping.h"
 #include "nsWrapperCache.h"
 #include "Performance.h"
 
@@ -68,10 +69,10 @@ public:
    *          page), if the given TimeStamp is valid. Otherwise, it will return
    *          the FetchStart timing value.
    */
-  inline DOMHighResTimeStamp TimeStampToDOMHighResOrFetchStart(TimeStamp aStamp)
+  inline DOMHighResTimeStamp TimeStampToReducedDOMHighResOrFetchStart(TimeStamp aStamp)
   {
     return (!aStamp.IsNull())
-        ? TimeStampToDOMHighRes(aStamp)
+        ? TimerClamping::ReduceMsTimeValue(TimeStampToDOMHighRes(aStamp))
         : FetchStartHighRes();
   }
 
@@ -119,7 +120,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetNavigationStart();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetNavigationStart());
   }
 
   DOMTimeMilliSec UnloadEventStart()
@@ -127,7 +128,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetUnloadEventStart();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetUnloadEventStart());
   }
 
   DOMTimeMilliSec UnloadEventEnd()
@@ -135,7 +136,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetUnloadEventEnd();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetUnloadEventEnd());
   }
 
   uint16_t GetRedirectCount() const;
@@ -185,7 +186,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetDomLoading();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetDomLoading());
   }
 
   DOMTimeMilliSec DomInteractive() const
@@ -193,7 +194,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetDomInteractive();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetDomInteractive());
   }
 
   DOMTimeMilliSec DomContentLoadedEventStart() const
@@ -201,7 +202,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetDomContentLoadedEventStart();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetDomContentLoadedEventStart());
   }
 
   DOMTimeMilliSec DomContentLoadedEventEnd() const
@@ -209,7 +210,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetDomContentLoadedEventEnd();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetDomContentLoadedEventEnd());
   }
 
   DOMTimeMilliSec DomComplete() const
@@ -217,7 +218,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetDomComplete();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetDomComplete());
   }
 
   DOMTimeMilliSec LoadEventStart() const
@@ -225,7 +226,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetLoadEventStart();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetLoadEventStart());
   }
 
   DOMTimeMilliSec LoadEventEnd() const
@@ -233,7 +234,7 @@ public:
     if (!nsContentUtils::IsPerformanceTimingEnabled()) {
       return 0;
     }
-    return GetDOMTiming()->GetLoadEventEnd();
+    return TimerClamping::ReduceMsTimeValue(GetDOMTiming()->GetLoadEventEnd());
   }
 
 private: