Add NetLog support to UDP sockets.

chrome/browser/resources/net_internals/source_entry.js

Index: chrome/browser/resources/net_internals/source_entry.js
===================================================================
--- chrome/browser/resources/net_internals/source_entry.js	(revision 104713)
+++ chrome/browser/resources/net_internals/source_entry.js	(working copy)
@@ -95,13 +95,29 @@
         this.description_ = e.params.host + ' (' + e.params.proxy + ')';
       break;
     case LogSourceType.SOCKET:
+      // Use description of parent source, if any.
       if (e.params.source_dependency != undefined) {
-        var connectJobId = e.params.source_dependency.id;
-        var connectJob = g_browser.sourceTracker.getSourceEntry(connectJobId);
-        if (connectJob)
-          this.description_ = connectJob.getDescription();
+        var parentId = e.params.source_dependency.id;
+        this.description_ = g_browser.sourceTracker.getDescription(parentId);
       }
       break;
+    case LogSourceType.UDP_SOCKET:
+      if (e.params.address != undefined) {
+        this.description_ = e.params.address;
+        // If the parent of |this| is a DNS_TRANSACTION, use
+        // '<DNS Server IP> [<DNS we're resolving>]'.
+        if (this.entries_[0].type == LogEventType.SOCKET_ALIVE &&
+            this.entries_[0].params.source_dependency != undefined) {
+          var parentId = this.entries_[0].params.source_dependency.id;
+          var parent = g_browser.sourceTracker.getSourceEntry(parentId);
+          if (parent &&
+              parent.getSourceType() == LogSourceType.DNS_TRANSACTION &&
+              parent.getDescription().length > 0) {
+            this.description_ += ' [' + parent.getDescription() + ']';
+          }
+        }
+      }
+      break;
     case LogSourceType.ASYNC_HOST_RESOLVER_REQUEST:
     case LogSourceType.DNS_TRANSACTION:
       this.description_ = e.params.hostname;
@@ -132,8 +148,10 @@
     return undefined;
   if (this.entries_.length >= 2) {
     if (this.entries_[0].type == LogEventType.REQUEST_ALIVE ||
-        this.entries_[0].type == LogEventType.SOCKET_POOL_CONNECT_JOB)
+        this.entries_[0].type == LogEventType.SOCKET_POOL_CONNECT_JOB ||
+        this.entries_[1].type == LogEventType.UDP_CONNECT) {
       return this.entries_[1];
+    }
   }
   return this.entries_[0];
 };