Download webstore CRXs into separate directory.

chrome/browser/extensions/api/webstore_private/webstore_private_api.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/extensions/api/webstore_private/webstore_private_api.h"
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_vector.h"
+#include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/crx_installer.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/extensions/extension_prefs.h"
@@ skipping 155 matching lines @@
 std::string GetWebstoreLogin(Profile* profile) {
   if (profile->GetPrefs()->HasPrefPath(kWebstoreLogin))
     return profile->GetPrefs()->GetString(kWebstoreLogin);
   return std::string();
 }
 
 void SetWebstoreLogin(Profile* profile, const std::string& login) {
   profile->GetPrefs()->SetString(kWebstoreLogin, login);
 }
 
+void RecordWebstoreExtensionInstallResult(bool success) {
+  UMA_HISTOGRAM_BOOLEAN("Webstore.ExtensionInstallResult", success);

[asargent_no_longer_on_chrome, 2013/11/07 00:18:47]

Does the histograms dashboard have an easy way for you to see the aggregate
values for this broken out by the field trial value? If not you might want to
switch to having two different histogram names, one for each field trial bucket.

[jackhou1, 2013/11/11 22:59:25]

Ah, thanks for pointing this out. The dashboard doesn't, but I think you can
generate histograms prefixed with the field trial using histograms.xml.

+}
+
 }  // namespace
 
 // static
 void WebstorePrivateApi::SetWebstoreInstallerDelegateForTesting(
     WebstoreInstaller::Delegate* delegate) {
   test_webstore_installer_delegate = delegate;
 }
 
 // static
 scoped_ptr<WebstoreInstaller::Approval>
@@ skipping 374 matching lines @@
 
 void WebstorePrivateCompleteInstallFunction::OnExtensionInstallSuccess(
     const std::string& id) {
   if (test_webstore_installer_delegate)
     test_webstore_installer_delegate->OnExtensionInstallSuccess(id);
 
   LOG(INFO) << "Install success, sending response";
   g_pending_installs.Get().EraseInstall(GetProfile(), id);
   SendResponse(true);
 
+  RecordWebstoreExtensionInstallResult(true);
+
   // Matches the AddRef in RunImpl().
   Release();
 }
 
 void WebstorePrivateCompleteInstallFunction::OnExtensionInstallFailure(
     const std::string& id,
     const std::string& error,
     WebstoreInstaller::FailureReason reason) {
   if (test_webstore_installer_delegate) {
     test_webstore_installer_delegate->OnExtensionInstallFailure(
         id, error, reason);
   }
 
   error_ = error;
   LOG(INFO) << "Install failed, sending response";
   g_pending_installs.Get().EraseInstall(GetProfile(), id);
   SendResponse(false);
 
+  RecordWebstoreExtensionInstallResult(false);
+
   // Matches the AddRef in RunImpl().
   Release();
 }
 
 WebstorePrivateEnableAppLauncherFunction::
     WebstorePrivateEnableAppLauncherFunction() {}
 
 WebstorePrivateEnableAppLauncherFunction::
     ~WebstorePrivateEnableAppLauncherFunction() {}
 
@@ skipping 55 matching lines @@
   return true;
 }
 
 bool WebstorePrivateIsInIncognitoModeFunction::RunImpl() {
   results_ = IsInIncognitoMode::Results::Create(
       GetProfile() != GetProfile()->GetOriginalProfile());
   return true;
 }
 
 }  // namespace extensions