Rewriting patch logic without the comma operator.

chrome/installer/setup/setup_main.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/installer/setup/setup_main.h"
 
 #include <windows.h>
 #include <msi.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 152 matching lines @@
     LOG(ERROR) << "Failed to find archive to patch.";
     *install_status = installer::DIFF_PATCH_SOURCE_MISSING;
     installer_state.WriteInstallerResult(*install_status,
                                          IDS_INSTALL_UNCOMPRESSION_FAILED_BASE,
                                          NULL);
     return false;
   }
   archive_helper->set_patch_source(patch_source);
 
   // Try courgette first. Failing that, try bspatch.
-  if ((installer_state.UpdateStage(installer::ENSEMBLE_PATCHING),
-       !archive_helper->EnsemblePatch()) &&
-      (installer_state.UpdateStage(installer::BINARY_PATCHING),
-       !archive_helper->BinaryPatch())) {
-    *install_status = installer::APPLY_DIFF_PATCH_FAILED;
-    installer_state.WriteInstallerResult(*install_status,
-                                         IDS_INSTALL_UNCOMPRESSION_FAILED_BASE,
-                                         NULL);
-    return false;
+  installer_state.UpdateStage(installer::ENSEMBLE_PATCHING);
+  if (!archive_helper->EnsemblePatch()) {
+    installer_state.UpdateStage(installer::BINARY_PATCHING);
+    if (!archive_helper->BinaryPatch()) {
+      *install_status = installer::APPLY_DIFF_PATCH_FAILED;
+      installer_state.WriteInstallerResult(
+          *install_status, IDS_INSTALL_UNCOMPRESSION_FAILED_BASE, NULL);
+      return false;
+    }
   }
 
   *archive_type = installer::INCREMENTAL_ARCHIVE_TYPE;
   return true;
 }
 
 // In multi-install, adds all products to |installer_state| that are
 // multi-installed and must be updated along with the products already present
 // in |installer_state|.
 void AddExistingMultiInstalls(const InstallationState& original_state,
@@ skipping 1498 matching lines @@
     // Note that we allow the status installer::UNINSTALL_REQUIRES_REBOOT
     // to pass through, since this is only returned on uninstall which is
     // never invoked directly by Google Update.
     return_code = InstallUtil::GetInstallReturnCode(install_status);
   }
 
   VLOG(1) << "Installation complete, returning: " << return_code;
 
   return return_code;
 }