Add a component installer for Portable NaCl. Registration of installer is

chrome/browser/component_updater/component_updater_configurator.cc

Index: chrome/browser/component_updater/component_updater_configurator.cc
diff --git a/chrome/browser/component_updater/component_updater_configurator.cc b/chrome/browser/component_updater/component_updater_configurator.cc
index aff33e7350b57ed4a3b22c6fef416a517674337f..d774157ac8a2fcafb6ec3273e9d40fd5b474aab6 100644
--- a/chrome/browser/component_updater/component_updater_configurator.cc
+++ b/chrome/browser/component_updater/component_updater_configurator.cc
@@ -29,6 +29,9 @@ const char kDebugFastUpdate[] = "fast-update";
 const char kDebugOutOfProcess[] = "out-of-process";
 // Add "testrequest=1" parameter to the update check query.
 const char kDebugRequestParam[] = "test-request";
+// Use the sandbox/staging Omaha for debugging instead of Omaha.
+const char kDebugUpdateURL[] = "staging-update-url";
+
 
 bool HasDebugValue(const std::vector<std::string>& vec, const char* test) {
   if (vec.empty())
@@ -102,6 +105,7 @@ class ChromeConfigurator : public ComponentUpdateService::Configurator {
   std::string extra_info_;
   bool fast_update_;
   bool out_of_process_;
+  bool use_debug_url_;
 };
 
 ChromeConfigurator::ChromeConfigurator(const CommandLine* cmdline,
@@ -114,6 +118,8 @@ ChromeConfigurator::ChromeConfigurator(const CommandLine* cmdline,
       ",", &debug_values);
   fast_update_ = HasDebugValue(debug_values, kDebugFastUpdate);
   out_of_process_ = HasDebugValue(debug_values, kDebugOutOfProcess);
+  use_debug_url_ = HasDebugValue(debug_values, kDebugUpdateURL);
+
   // Make the extra request params, they are necessary so omaha does
   // not deliver components that are going to be rejected at install time.
   extra_info_ += chrome::VersionInfo().Version();
@@ -138,7 +144,11 @@ int ChromeConfigurator::MinimumReCheckWait() {
 }
 
 GURL ChromeConfigurator::UpdateUrl() {
-  return GURL("http://clients2.google.com/service/update2/crx");
+  if (!use_debug_url_) {
+    return GURL("http://clients2.google.com/service/update2/crx");
+  } else {
+    return GURL("http://omaha.sandbox.google.com/service/update2/crx");
+  }
 }
 
 const char* ChromeConfigurator::ExtraRequestParams() {