Add UMA stats for how often we get a 200 for a byte-range request for NPAPI plugins.

content/renderer/npapi/webplugin_impl.cc

 // Copyright (c) 2012 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 "content/renderer/npapi/webplugin_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/crash_logging.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "cc/layers/io_surface_layer.h"
 #include "content/child/appcache/web_application_cache_host_impl.h"
 #include "content/child/npapi/plugin_host.h"
 #include "content/child/npapi/plugin_instance.h"
 #include "content/child/npapi/webplugin_delegate_impl.h"
 #include "content/child/npapi/webplugin_resource_client.h"
 #include "content/common/view_messages.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/npapi/webplugin_delegate_proxy.h"
 #include "content/renderer/render_process.h"
+#include "content/renderer/render_thread_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "net/base/escape.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_response_headers.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/WebCString.h"
 #include "third_party/WebKit/public/platform/WebCookieJar.h"
 #include "third_party/WebKit/public/platform/WebData.h"
 #include "third_party/WebKit/public/platform/WebHTTPBody.h"
 #include "third_party/WebKit/public/platform/WebHTTPHeaderVisitor.h"
@@ skipping 934 matching lines @@
         return;
       }
       int64 upper_bound = 0, instance_size = 0;
       // Single range requested - go through original processing for
       // non-multipart requests, but update data offset.
       MultipartResponseDelegate::ReadContentRanges(response,
                                                    &client_info->data_offset,
                                                    &upper_bound,
                                                    &instance_size);
     } else if (response.httpStatusCode() == kHttpResponseSuccessStatusCode) {
+      RenderThreadImpl::current()->RecordUserMetrics("Plugin_200ForByteRange");
       // If the client issued a byte range request and the server responds with
       // HTTP 200 OK, it indicates that the server does not support byte range
       // requests.
       // We need to emulate Firefox behavior by doing the following:-
       // 1. Destroy the plugin instance in the plugin process. Ensure that
       //    existing resource requests initiated for the plugin instance
       //    continue to remain valid.
       // 2. Create a new plugin instance and notify it about the response
       //    received here.
       if (!ReinitializePluginForResponse(loader)) {
@@ skipping 507 matching lines @@
     case PLUGIN_SRC:
       webframe_->setReferrerForRequest(*request, plugin_url_);
       break;
 
     default:
       break;
   }
 }
 
 }  // namespace content