[win] Add a progress bar in the app launcher for app installs.

chrome/browser/extensions/api/webstore_private/webstore_private_api.cc

Index: chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
diff --git a/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc b/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
index f585ed2f5ce311505f4a2167ba5257b9e08434be..96d6ffe99e9354fedbfa491cc46efb813a2fbd29 100644
--- a/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
+++ b/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
@@ -468,8 +468,10 @@ void CompleteInstallFunction::OnGetAppLauncherEnabled(
     bool app_launcher_enabled) {
   if (app_launcher_enabled) {
     std::string name;
-    DCHECK(approval_->parsed_manifest->GetString(extension_manifest_keys::kName,
-                                                &name));
+    if (!approval_->parsed_manifest->GetString(extension_manifest_keys::kName,
+                                                &name)) {
+      NOTREACHED();
+    }
     // Tell the app list about the install that we just started.
     chrome::NotifyAppListOfBeginExtensionInstall(
         profile(), id, name, approval_->installing_icon);
@@ -511,6 +513,12 @@ void CompleteInstallFunction::OnExtensionInstallFailure(
   Release();
 }
 
+void CompleteInstallFunction::OnExtensionDownloadProgress(
+    const std::string& id,
+    content::DownloadItem* item) {
+  chrome::NotifyAppListOfDownloadProgress(profile(), id,
+                                          item->PercentComplete());
+}
 
 bool GetBrowserLoginFunction::RunImpl() {
   SetResult(CreateLoginResult(profile_->GetOriginalProfile()));