PDF: Add UMA to track successful / failed PDF loads

chrome/renderer/plugins/plugin_uma.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/plugins/plugin_uma.h"
 
 #include <algorithm>
 #include <cstring>
 
 #include "base/macros.h"
@@ skipping 61 matching lines @@
                                 GetPluginType(plugin_mime_type, plugin_src));
 }
 
 void PluginUMAReporter::ReportPluginDisabled(
     const std::string& plugin_mime_type,
     const GURL& plugin_src) {
   report_sender_->SendPluginUMA(DISABLED_PLUGIN,
                                 GetPluginType(plugin_mime_type, plugin_src));
 }
 
+// static
+void PluginUMAReporter::ReportPDFLoadStatus(PDFLoadStatus status) {
+  UMA_HISTOGRAM_ENUMERATION("PDF.LoadStatus", status,
+                            PluginUMAReporter::PDF_LOAD_STATUS_MAX);
+}
+
 PluginUMAReporter::PluginUMAReporter() : report_sender_(new UMASenderImpl()) {}
 
 PluginUMAReporter::~PluginUMAReporter() {}
 
 // static.
 bool PluginUMAReporter::CompareCStrings(const char* first, const char* second) {
   return strcmp(first, second) < 0;
 }
 
 bool PluginUMAReporter::CStringArrayContainsCString(const char* const* array,
@@ skipping 87 matching lines @@
     return SHOCKWAVE_FLASH;
   }
 
 #if BUILDFLAG(ENABLE_PEPPER_CDMS)
   if (mime_type == kWidevineCdmPluginMimeType)
     return WIDEVINE_CDM;
 #endif
 
   return UNSUPPORTED_MIMETYPE;
 }