Assume all providers may give zero suggest responses.

chrome/browser/autocomplete/builtin_provider.cc

Index: chrome/browser/autocomplete/builtin_provider.cc
diff --git a/chrome/browser/autocomplete/builtin_provider.cc b/chrome/browser/autocomplete/builtin_provider.cc
index 2bf721e7579709baa906064e286cb2a554a01481..d3bd7a78a258bd03022240ec3076246640158d02 100644
--- a/chrome/browser/autocomplete/builtin_provider.cc
+++ b/chrome/browser/autocomplete/builtin_provider.cc
@@ -61,9 +61,11 @@ BuiltinProvider::BuiltinProvider()
 }
 
 void BuiltinProvider::Start(const AutocompleteInput& input,
-                            bool minimal_changes) {
+                            bool minimal_changes,
+                            bool called_due_to_focus) {
   matches_.clear();
-  if ((input.type() == metrics::OmniboxInputType::INVALID) ||
+  if (called_due_to_focus ||
+      (input.type() == metrics::OmniboxInputType::INVALID) ||
       (input.type() == metrics::OmniboxInputType::FORCED_QUERY) ||
       (input.type() == metrics::OmniboxInputType::QUERY))
     return;