Remove code for deprecated and rotted histogram.

third_party/WebKit/Source/core/html/parser/HTMLScriptRunner.h

Index: third_party/WebKit/Source/core/html/parser/HTMLScriptRunner.h
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLScriptRunner.h b/third_party/WebKit/Source/core/html/parser/HTMLScriptRunner.h
index 84f7ef9fe9bcf81d184bf43a98e6e62689f53d10..192059fbc618e278bce8ecab773fd0e88ca36daa 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLScriptRunner.h
+++ b/third_party/WebKit/Source/core/html/parser/HTMLScriptRunner.h
@@ -99,11 +99,6 @@ private:
     // cause nested script execution when parsing <style> tags since </style>
     // tags can cause Document to call executeScriptsWaitingForResources.
     bool m_hasScriptsWaitingForResources;
-
-    // For tracking the times between script load and compilation, we need to
-    // know whether a parser blocking script was loaded previously, or whether
-    // it's really loaded when requested.
-    bool m_parserBlockingScriptAlreadyLoaded;
 };
 
 } // namespace blink