Create CrxInstaller directly in WebstoreInstaller

chrome/browser/extensions/webstore_installer.cc

Index: chrome/browser/extensions/webstore_installer.cc
diff --git a/chrome/browser/extensions/webstore_installer.cc b/chrome/browser/extensions/webstore_installer.cc
index f9cfafa8e4a6e51a4e5fd0faa2ee6d50d18c4bdc..628e68d069f25fcb16d36ca94cb0c9e47524a0fe 100644
--- a/chrome/browser/extensions/webstore_installer.cc
+++ b/chrome/browser/extensions/webstore_installer.cc
@@ -337,7 +337,7 @@ void WebstoreInstaller::Observe(int type,
           content::Details<const Extension>(details).ptr();
       CrxInstaller* installer = content::Source<CrxInstaller>(source).ptr();
       if (extension == NULL && download_item_ != NULL &&
-          installer->download_url() == download_item_->GetURL() &&
+          installer->download_id() == download_item_->GetId() &&
           installer->profile()->IsSameProfile(profile_)) {
         ReportFailure(kInstallCanceledError, FAILURE_REASON_CANCELLED);
       }
@@ -389,7 +389,7 @@ void WebstoreInstaller::Observe(int type,
       const base::string16* error =
           content::Details<const base::string16>(details).ptr();
       const std::string utf8_error = base::UTF16ToUTF8(*error);
-      if (download_url_ == crx_installer->original_download_url())
+      if (download_item_->GetId() == crx_installer->download_id())
         ReportFailure(utf8_error, FAILURE_REASON_OTHER);
       break;
     }