Do not reset stream if HTTP/2 response contains status text.

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 9b137b41d02dff19fd47f838364dd9d98dddfc58..d686de41a1cff64a90113efda9a691754fab348b 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -31219,6 +31219,11 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Net.Http2ResponseStatusHeader" enum="StatusHeader">
+  <owner>bnc@chromium.org</owner>
+  <summary>Format of :status header value in HTTP/2 response.</summary>
+</histogram>
+
 <histogram name="Net.Http2SSLCipherSuite" enum="SSLCipherSuite">
   <owner>davidben@chromium.org</owner>
   <summary>
@@ -103422,6 +103427,13 @@ value.
   <int value="3" label="No pref change: was equal to platform-specific store"/>
 </enum>
 
+<enum name="StatusHeader" type="int">
+  <int value="0" label="Headers do not include :status header field."/>
+  <int value="1" label=":status header does not start with a number."/>
+  <int value="2" label=":status header is an integer."/>
+  <int value="3" label=":status header is an integer followed by text."/>
+</enum>
+
 <enum name="StayVsLeave" type="int">
   <int value="0" label="Stay on the current page"/>
   <int value="1" label="Leave the current page"/>