Add metrics to record TCP/UDP connections made from Flash

content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.cc

Index: content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.cc
diff --git a/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.cc b/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.cc
index f29fc977fe941c7c035940cdabc2f094dc62c42f..194667186f628cdedc368ac720995b7b8f9f1772 100644
--- a/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.cc
+++ b/content/browser/renderer_host/pepper/pepper_tcp_socket_message_filter.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/profiler/scoped_tracker.h"
 #include "build/build_config.h"
 #include "content/browser/renderer_host/pepper/content_browser_pepper_host_factory.h"
@@ -1000,6 +1001,14 @@ void PepperTCPSocketMessageFilter::SendConnectReply(
     int32_t pp_result,
     const PP_NetAddress_Private& local_addr,
     const PP_NetAddress_Private& remote_addr) {
+  pepper_socket_utils::PluginContextSecurity security =
+      host_->IsPotentiallySecurePluginContext(instance_)
+          ? pepper_socket_utils::PLUGIN_CONTEXT_SECURE
+          : pepper_socket_utils::PLUGIN_CONTEXT_INSECURE;
+  UMA_HISTOGRAM_ENUMERATION(
+      "Pepper.PluginContextSecurity.TCPConnect", security,
+      pepper_socket_utils::PLUGIN_CONTEXT_SECURITY_NUM_ENTRIES);

[Ilya Sherman, 2015/05/14 02:26:01]

nit: Since you're currently tracking a boolean value, you could use
UMA_HISTOGRAM_BOOLEAN instead, to save on some boilerplate.  If you were to ever
decide to add more buckets to the histogram, it would be safe to switch over to
UMA_HISTOGRAM_ENUMERATION at that time.

[raymes, 2015/05/14 02:47:44]

Done.

+
   ppapi::host::ReplyMessageContext reply_context(context);
   reply_context.params.set_result(pp_result);
   SendReply(reply_context,