Adding the --load-component-extension flag.

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index e8f0e9584a4e1c45f4e7df703984ea31b30a9520..c571cb749e5e7427f6144542c811c61d56e988d0 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -12,6 +12,7 @@
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
+#include "base/string_tokenizer.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
@@ -398,6 +399,13 @@ void ProfileImpl::DoFinalInit() {
       content::NotificationService::NoDetails());
 }
 
+static void AddOrReplaceComponentExtension(extensions::ComponentLoader* loader,

[Aaron Boodman, 2011/12/06 19:43:35]

Why did you pull this out into a function? It's not repeated. This code can just
go right inside the loop.

Also, even if you were going to do this, it's weird to throw a static function
into the middle of a class's implementation this way.

[SeRya, 2011/12/06 22:19:37]

Reverted this change.

+                                           FilePath const& path) {
+  // Load the component extension manifest synchronously.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;

[Aaron Boodman, 2011/12/06 19:43:35]

This is still making me nervous. Since you are already working on this, can you
please add some logging to understand how it was working without this? This
might be a bad bug that we need to fix.

[SeRya, 2011/12/06 22:19:37]

I will try to figure out why it did work, but the logging probably shouldn't be
in the CL.

+  loader->AddOrReplace(path);
+}
+
 void ProfileImpl::InitExtensions(bool extensions_enabled) {
   if (user_script_master_ || extension_service_.get())
     return;  // Already initialized.
@@ -436,6 +444,17 @@ void ProfileImpl::InitExtensions(bool extensions_enabled) {
       extensions_enabled));
 
   extension_service_->component_loader()->AddDefaultComponentExtensions();
+  if (command_line->HasSwitch(switches::kLoadComponentExtension)) {
+    CommandLine::StringType path_list = command_line->GetSwitchValueNative(
+        switches::kLoadComponentExtension);
+    StringTokenizerT<CommandLine::StringType,
+        CommandLine::StringType::const_iterator> t(path_list,
+                                                   FILE_PATH_LITERAL(","));
+    while (t.GetNext()) {
+      AddOrReplaceComponentExtension(
+          extension_service_->component_loader(), FilePath(t.token()));
+    }
+  }
   extension_service_->Init();
 
   if (extensions_enabled) {