Isolate initiation counts for downloads to their own histograms and improve

chrome/browser/plugin_installer.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 "chrome/browser/plugin_installer.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/process.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_service.h"
+#include "chrome/browser/download/download_util.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/plugin_installer_observer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "content/browser/download/download_types.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 #include "content/public/browser/download_id.h"
 #include "content/public/browser/download_manager.h"
 #include "content/public/browser/browser_context.h"
@@ skipping 109 matching lines @@
 }
 
 void PluginInstaller::StartInstalling(TabContentsWrapper* wrapper) {
   DCHECK(state_ == kStateIdle);
   DCHECK(!url_for_display_);
   state_ = kStateDownloading;
   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadStarted());
   content::WebContents* web_contents = wrapper->web_contents();
   DownloadService* download_service =
       DownloadServiceFactory::GetForProfile(wrapper->profile());
+  download_util::RecordDownloadSource(
+      download_util::INITIATED_BY_PLUGIN_INSTALLER);
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&BeginDownload,
                  plugin_url_, ResourceDispatcherHost::Get(),
                  wrapper->profile()->GetResourceContext(),
                  web_contents->GetRenderProcessHost()->GetID(),
                  web_contents->GetRenderViewHost()->routing_id(),
                  base::Bind(&PluginInstaller::DownloadStarted,
                             base::Unretained(this),
                             make_scoped_refptr(
@@ skipping 31 matching lines @@
   DCHECK(state_ == kStateDownloading);
   state_ = kStateIdle;
   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadError(msg));
 }
 
 void PluginInstaller::DownloadCancelled() {
   DCHECK(state_ == kStateDownloading);
   state_ = kStateIdle;
   FOR_EACH_OBSERVER(PluginInstallerObserver, observers_, DownloadCancelled());
 }