Mute use counters for internal pages

third_party/WebKit/Source/core/frame/UseCounter.h

Index: third_party/WebKit/Source/core/frame/UseCounter.h
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.h b/third_party/WebKit/Source/core/frame/UseCounter.h
index 590b0749a3e06852839a347d12c4a6dd304aa64f..31817e91caa81d6537b9707d0b1acc7eee89242d 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -29,6 +29,7 @@
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/css/parser/CSSParserMode.h"
+#include "platform/weborigin/KURL.h"
 #include "wtf/BitVector.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/text/WTFString.h"
@@ -1428,7 +1429,7 @@ class CORE_EXPORT UseCounter {
   static bool isCounted(Document&, const String&);
   bool isCounted(CSSPropertyID unresolvedProperty);
 
-  void didCommitLoad();
+  void didCommitLoad(KURL);
 
   static UseCounter* getFrom(const Document*);
   static UseCounter* getFrom(const CSSStyleSheet*);
@@ -1448,7 +1449,15 @@ class CORE_EXPORT UseCounter {
   EnumerationHistogram& featuresHistogram() const;
   EnumerationHistogram& cssHistogram() const;
 
+  // If non-zero, ignore all usage (eg. because we're not currently running
+  // code that's interesting from a metrics perspective).
   unsigned m_muteCount;
+
+  // If true, m_muteCount is currently incremented due to loading a page that's
+  // not interesting from a metrics perspective.
+  bool m_mutedByLoad;
+
+  // The scope represented by this UseCounter instance.
   Context m_context;
 
   // Track what features/properties have been reported to the (non-legacy)