UMA: Add WebCore.WebSocket.SendType

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 58bd25d91442ef28241707a5617df087fe2e8695..9bd14d477564e5e1038a65afd1af40e38987ec4b 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -29769,6 +29769,16 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="WebCore.WebSocket.SendType" enum="WebSocketSendType">
+  <owner>yhirano@chromium.org</owner>
+  <owner>ricea@chromium.org</owner>
+  <owner>tyoshino@chromium.org</owner>
+  <summary>
+    Count the number of send() method calls on WebSockets for each argument
+    type.
+  </summary>
+</histogram>
+
 <histogram name="WebCore.XHR.send.ArrayBufferOrView"
     enum="XMLHttpRequestSendArrayBufferOrView">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
@@ -42158,6 +42168,13 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="1" label="TakeOverContext"/>
 </enum>
 
+<enum name="WebSocketSendType" type="int">
+  <int value="0" label="String"/>
+  <int value="1" label="ArrayBuffer"/>
+  <int value="2" label="ArrayBufferView"/>
+  <int value="3" label="Blob"/>
+</enum>
+
 <enum name="WiFiApMode" type="int">
   <int value="0" label="Unknown"/>
   <int value="1" label="Managed"/>