Some more debug logging for extension loading failure.

* print chrome cmd line
* take a screenshot
* increase logging of extension code
* wait for extensions after opening a browser window

BUG=304442
TEST=Manual
NOTRY=True

Review URL: https://codereview.chromium.org/59873005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234356 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 3ca42f0..9fdefc0 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -1766,6 +1766,7 @@
       extension_prefs_->GetVersionString(extension->id()));
   const Version old_version(old_version_string);
 
+  VLOG(1) << "AddComponentExtension " << extension->name();
   if (!old_version.IsValid() || !old_version.Equals(*extension->version())) {
     VLOG(1) << "Component extension " << extension->name() << " ("
         << extension->id() << ") installing/upgrading from '"