Don't call AutocompleteInput::Parse() on a background thread, part 2.

chrome/browser/autocomplete/autocomplete_input.cc

Index: chrome/browser/autocomplete/autocomplete_input.cc
diff --git a/chrome/browser/autocomplete/autocomplete_input.cc b/chrome/browser/autocomplete/autocomplete_input.cc
index fbf04db017fa5a90c6680d6a57aecba6c324f708..27edc397a6bb99ee8b06a51d6b58003ba5f1ea00 100644
--- a/chrome/browser/autocomplete/autocomplete_input.cc
+++ b/chrome/browser/autocomplete/autocomplete_input.cc
@@ -130,6 +130,11 @@ AutocompleteInput::Type AutocompleteInput::Parse(
     url::Parsed* parts,
     base::string16* scheme,
     GURL* canonicalized_url) {
+  // NOT FOR COMMIT: Remove this once trybots make it clear no callers call this

[Mark P, 2014/06/18 18:23:44]

Remember this.

+  // on a non-UI thread.
+  CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI) ||
+      !content::BrowserThread::IsThreadInitialized(content::BrowserThread::UI));
+
   size_t first_non_white = text.find_first_not_of(base::kWhitespaceUTF16, 0);
   if (first_non_white == base::string16::npos)
     return metrics::OmniboxInputType::INVALID;  // All whitespace.