Drop the PLT.StartToFinish.(Proxy / NoProxy) 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 1a0c7e1d01564b01a763bd87d1637d4b1dfed194..f708e2d5784fd832bd940273be4885a33880ea16 100644
--- a/chrome/renderer/page_load_histograms.cc
+++ b/chrome/renderer/page_load_histograms.cc
@@ -687,25 +687,6 @@ void DumpDeprecatedHistograms(const WebPerformance& performance,
         break;
     }
   }
-
-  // Record page load time and abandonment rates for proxy cases.
-  if (document_state->was_fetched_via_proxy()) {
-    if (scheme_type == URLPattern::SCHEME_HTTPS) {
-      PLT_HISTOGRAM("PLT.StartToFinish.Proxy.https", start_to_finish_all_loads);
-    } else {
-      DCHECK(scheme_type == URLPattern::SCHEME_HTTP);
-      PLT_HISTOGRAM("PLT.StartToFinish.Proxy.http", start_to_finish_all_loads);
-    }
-  } else {
-    if (scheme_type == URLPattern::SCHEME_HTTPS) {
-      PLT_HISTOGRAM("PLT.StartToFinish.NoProxy.https",
-                    start_to_finish_all_loads);
-    } else {
-      DCHECK(scheme_type == URLPattern::SCHEME_HTTP);
-      PLT_HISTOGRAM("PLT.StartToFinish.NoProxy.http",
-                    start_to_finish_all_loads);
-    }
-  }
 }
 
 }  // namespace