Upstreaming SpdyProxy-related switches, OTR logic, and histograms

chrome/renderer/page_load_histograms.cc

Index: chrome/renderer/page_load_histograms.cc
diff --git a/chrome/renderer/page_load_histograms.cc b/chrome/renderer/page_load_histograms.cc
index 85b45a096a98a9ec2d4bdbea4e5ced16dda23f83..a2c511d510f080065f0c0401748c7c9bf284e26a 100644
--- a/chrome/renderer/page_load_histograms.cc
+++ b/chrome/renderer/page_load_histograms.cc
@@ -4,10 +4,12 @@
 
 #include "chrome/renderer/page_load_histograms.h"
 
+#include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/url_pattern.h"
 #include "chrome/renderer/chrome_content_renderer_client.h"
 #include "chrome/renderer/prerender/prerender_helper.h"
@@ -351,6 +353,15 @@ void PageLoadHistograms::Dump(WebFrame* frame) {
     }
   }
 
+  if (document_state->was_fetched_via_proxy() &&
+      document_state->was_fetched_via_spdy() &&
+      CommandLine::ForCurrentProcess()->HasSwitch(switches::kSpdyProxyOrigin)) {
+    UMA_HISTOGRAM_ENUMERATION(
+        "PLT.Abandoned_SpdyProxy", abandoned_page ? 1 : 0, 2);
+    PLT_HISTOGRAM("PLT.BeginToFinishDoc_SpdyProxy", begin_to_finish_doc);
+    PLT_HISTOGRAM("PLT.BeginToFinish_SpdyProxy", begin_to_finish_all_loads);
+  }
+
   // Histograms to determine if prefetch & prerender has an impact on PLT.
   static const bool prefetching_fieldtrial =
       base::FieldTrialList::TrialExists("Prefetch");