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

chrome/browser/ui/browser_init.cc

Index: chrome/browser/ui/browser_init.cc
diff --git a/chrome/browser/ui/browser_init.cc b/chrome/browser/ui/browser_init.cc
index 7ba03b7aa5b74e058821e6aa8bdf4823538711f5..32c7f6b98044346ab4d6d9e07a330de5df0fa878 100644
--- a/chrome/browser/ui/browser_init.cc
+++ b/chrome/browser/ui/browser_init.cc
@@ -69,6 +69,7 @@
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/installer/util/browser_distribution.h"
+#include "chrome/nacl/pnacl_component_installer.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/child_process_security_policy.h"
 #include "content/browser/renderer_host/render_process_host.h"
@@ -527,7 +528,7 @@ void RecordAppLaunches(
   }
 }
 
-void RegisterComponentsForUpdate() {
+void RegisterComponentsForUpdate(const CommandLine& command_line) {
   ComponentUpdateService* cus = g_browser_process->component_updater();
   if (!cus)
     return;
@@ -538,6 +539,11 @@ void RegisterComponentsForUpdate() {
   RegisterPepperFlashComponent(cus);
   RegisterNPAPIFlashComponent(cus);
 
+  // This developer version of PNaCl should only be installed for developers.
+  if (command_line.HasSwitch(switches::kEnablePNaCl)) {
+    RegisterPNaClComponent(cus);
+  }
+
   // CRLSetFetcher attempts to load a CRL set from either the local disk
   // or network.
   // TODO(agl): this is disabled for now while it's plumbed in.
@@ -1395,7 +1401,7 @@ bool BrowserInit::ProcessCmdLineImpl(const CommandLine& command_line,
     if (command_line.HasSwitch(switches::kDisablePromptOnRepost))
       NavigationController::DisablePromptOnRepost();
 
-    RegisterComponentsForUpdate();
+    RegisterComponentsForUpdate(command_line);
 
     // Look for the testing channel ID ONLY during process startup
     if (command_line.HasSwitch(switches::kTestingChannelID)) {