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 cd280cd25ebf44f85b695fc3996b9f9f9307dd37..8978729da772891c8dbf5be34dbb3652483c747e 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"
@@ -444,6 +445,17 @@ 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()) {
+      extension_service_->component_loader()->AddOrReplace(

[Aaron Boodman, 2011/12/05 22:11:26]

How does this work? It seems like it should DCHECK because it is doing file IO
on the UI thread?

[SeRya, 2011/12/06 08:19:27]

Now sure why it works. Probably caller code allows IO. But it's less fragile to
allow IO explicitly. Added.

+          FilePath(t.token()));
+    }
+  }
   extension_service_->Init();
 
   if (extensions_enabled) {