Update histograms.xml.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index eee68bddd2c9f3cdca49a354ca83347e851f2f45..6e5221a6cb5ced767053e387307e807ef434aad2 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -51722,13 +51722,19 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="746" label="TabStopProperty"/>
   <int value="747" label="TabStopAttribute"/>
   <int value="748" label="LegacyConst"/>
+  <int value="749" label="SVGFilterRes"/>
   <int value="750" label="V8Permissions_Query_Method"/>
+  <int value="751" label="LegacyCSSValueIntrinsic"/>
+  <int value="752" label="LegacyCSSValueMinIntrinsic"/>
+  <int value="753" label="WebkitCanvas"/>
   <int value="754" label="V8HTMLInputElement_Autocapitalize_AttributeGetter"/>
   <int value="755" label="V8HTMLInputElement_Autocapitalize_AttributeSetter"/>
   <int value="756"
       label="V8HTMLTextAreaElement_Autocapitalize_AttributeGetter"/>
   <int value="757"
       label="V8HTMLTextAreaElement_Autocapitalize_AttributeSetter"/>
+  <int value="758" label="SVGHrefBaseVal"/>
+  <int value="759" label="SVGHrefAnimVal"/>
 </enum>
 
 <enum name="FFmpegCodecs" type="int">