AddedLogging to webstore private API for app launcher install.

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 "apps/app_launcher.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 422 matching lines @@
         kNoPreviousBeginInstallWithManifestError, id);
     return false;
   }
 
   // Balanced in OnExtensionInstallSuccess() or OnExtensionInstallFailure().
   AddRef();
 
 #if defined(OS_WIN)
   if (approval_->enable_launcher) {
     if (BrowserDistribution::GetDistribution()->AppHostIsSupported()) {
+      LOG(INFO) << "Enabling App Launcher via installation";
       extensions::AppHostInstaller::SetInstallWithLauncher(true);
       extensions::AppHostInstaller::EnsureAppHostInstalled(
           base::Bind(&CompleteInstallFunction::AfterMaybeInstallAppLauncher,
                      this));
       return true;
     } else {
+      LOG(INFO) << "Enabling App Launcher via flags";
       about_flags::SetExperimentEnabled(g_browser_process->local_state(),
                                         switches::kShowAppListShortcut,
                                         true);
     }
   }
 #endif
   AfterMaybeInstallAppLauncher(true);
 
   return true;
 }
 
 void CompleteInstallFunction::AfterMaybeInstallAppLauncher(bool ok) {
+  if (!ok)
+    LOG(ERROR) << "Error installing app launcher";
   apps::GetIsAppLauncherEnabled(base::Bind(
       &CompleteInstallFunction::OnGetAppLauncherEnabled, this,
       approval_->extension_id));
 }
 
 void CompleteInstallFunction::OnGetAppLauncherEnabled(
     std::string id,
     bool app_launcher_enabled) {
   if (app_launcher_enabled) {
     std::string name;
@@ skipping 113 matching lines @@
       &GetIsLauncherEnabledFunction::OnIsLauncherCheckCompleted, this));
   return true;
 }
 
 void GetIsLauncherEnabledFunction::OnIsLauncherCheckCompleted(bool is_enabled) {
   SetResult(Value::CreateBooleanValue(is_enabled));
   SendResponse(true);
 }
 
 }  // namespace extensions