autocomplete: Add AutocompleteProvider::Type enum.

chrome/browser/autocomplete/autocomplete_match.cc

Index: chrome/browser/autocomplete/autocomplete_match.cc
diff --git a/chrome/browser/autocomplete/autocomplete_match.cc b/chrome/browser/autocomplete/autocomplete_match.cc
index d00ac976fcfb01120c87c6f359721bc80a857831..778e485a714a10b52a4d5820c52cb9e2720cd877 100644
--- a/chrome/browser/autocomplete/autocomplete_match.cc
+++ b/chrome/browser/autocomplete/autocomplete_match.cc
@@ -397,14 +397,15 @@ void AutocompleteMatch::ValidateClassifications(
   size_t last_offset = classifications[0].offset;
   for (ACMatchClassifications::const_iterator i(classifications.begin() + 1);
        i != classifications.end(); ++i) {
+    const char* provider_name = provider ? provider->GetName() : "None";
     DCHECK_GT(i->offset, last_offset)
         << " Classification for \"" << text << "\" with offset of " << i->offset
         << " is unsorted in relation to last offset of " << last_offset
-        << ". Provider: " << (provider ? provider->name() : "None") << ".";
+        << ". Provider: " << provider_name << ".";
     DCHECK_LT(i->offset, text.length())
         << " Classification of [" << i->offset << "," << text.length()
         << "] is out of bounds for \"" << text << "\". Provider: "
-        << (provider ? provider->name() : "None") << ".";
+        << provider_name << ".";
     last_offset = i->offset;
   }
 }