Adding a SW reporter component updater

chrome/browser/component_updater/sw_reporter_component_installer_win.h

+// Copyright (c) 2014 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.
+
+#ifndef CHROME_BROWSER_COMPONENT_UPDATER_SW_REPORTER_COMPONENT_INSTALLER_WIN_H_
+#define CHROME_BROWSER_COMPONENT_UPDATER_SW_REPORTER_COMPONENT_INSTALLER_WIN_H_
+
+class PrefRegistrySimple;
+class PrefService;
+
+namespace component_updater {

[Sorin Jianu, 2014/06/19 19:08:48]

The logic implemented by the Execute public members seems complex. It would be
highly desirable to separate the code that is calling into updater service from
the code that deals with the actual functionality of the reporter. In general,
considering CUS as a black box, the input is provided by the Register function,
and the output happens when ComponentReady is called. Then the specific
component code takes over.

+
+class ComponentUpdateService;
+
+// Execute will execute the SwReporter if one is available, otherwise 1)
+// register with the component updater, 2) save a preference in |prefs|
+// identifying that an attempt to execute the reporter tool was made, so that
+// calls to ExecutePending below will be able to continue the work if it doesn't
+// complete before the Chrome session ends. It will also allow the component
+// updater to know if there is a pending execution or not when an update
+// happens.
+void ExecuteSwReporterComponent(ComponentUpdateService* cus,

[Sorin Jianu, 2014/06/19 19:08:48]

In the spirit of reducing clutter, since we live in component_updater namespace,
maybe consider dropping the Component suffix, here and other places, so that the
artifacts are called SwReporter.

We only added a namespace later, and so, our existing naming is excessively
adorned with "Component" (not good, we'll refactor in the future).

+                                PrefService* prefs);
+
+// ExecutePending will only register/execute the SwReporter component if a
+// preference is set in |prefs|, identifying that an attempt to register/execute
+// the SwReporter has already been made by calling ExecuteSwReporterComponent
+// above. But only if the max number of retries has not been reached yet.
+void ExecutePendingSwReporterComponent(ComponentUpdateService* cus,
+                                       PrefService* prefs);
+
+// Register user preferences related to the SwReporter component.
+void RegisterPrefsForSwReporterComponent(PrefRegistrySimple* registry);
+
+}  // namespace component_updater
+
+#endif  // CHROME_BROWSER_COMPONENT_UPDATER_SW_REPORTER_COMPONENT_INSTALLER_WIN_H_