Histograms - Support histograms for Plugins, GPU

chrome/common/chrome_constants.h

Index: chrome/common/chrome_constants.h
===================================================================
--- chrome/common/chrome_constants.h	(revision 146279)
+++ chrome/common/chrome_constants.h	(working copy)
@@ -100,13 +100,6 @@
 
 extern const bool kRecordModeEnabled;
 
-// Most sequence numbers are used by a renderer when responding to a browser
-// request for histogram data.  This reserved number is used when a renderer
-// sends an unprovoked update, such as after a page has been loaded.  Using
-// this reserved constant avoids any chance of confusion with a response having
-// a browser-supplied sequence number.
-extern const int kHistogramSynchronizerReservedSequenceNumber;
-
 // The language code used when the language of a page could not be detected.
 // (Matches what the CLD -Compact Language Detection- library reports.)
 extern const char* const kUnknownLanguageCode;