Assume all providers may give zero suggest responses.

chrome/browser/autocomplete/bookmark_provider_unittest.cc

Index: chrome/browser/autocomplete/bookmark_provider_unittest.cc
diff --git a/chrome/browser/autocomplete/bookmark_provider_unittest.cc b/chrome/browser/autocomplete/bookmark_provider_unittest.cc
index 78b8a683aead1ca73cd241667daf284bafc8a264..8995c5f0921eab49a3cc882666fc231c73a033a8 100644
--- a/chrome/browser/autocomplete/bookmark_provider_unittest.cc
+++ b/chrome/browser/autocomplete/bookmark_provider_unittest.cc
@@ -267,7 +267,7 @@ TEST_F(BookmarkProviderTest, Positions) {
                             metrics::OmniboxEventProto::INVALID_SPEC, false,
                             false, false, true,
                             ChromeAutocompleteSchemeClassifier(profile_.get()));
-    provider_->Start(input, false);
+    provider_->Start(input, false, false);
     const ACMatches& matches(provider_->matches());
     // Validate number of results is as expected.
     EXPECT_LE(matches.size(), query_data[i].match_count)
@@ -348,7 +348,7 @@ TEST_F(BookmarkProviderTest, Rankings) {
                             metrics::OmniboxEventProto::INVALID_SPEC, false,
                             false, false, true,
                             ChromeAutocompleteSchemeClassifier(profile_.get()));
-    provider_->Start(input, false);
+    provider_->Start(input, false, false);
     const ACMatches& matches(provider_->matches());
     // Validate number and content of results is as expected.
     for (size_t j = 0; j < std::max(query_data[i].match_count, matches.size());
@@ -448,7 +448,7 @@ TEST_F(BookmarkProviderTest, StripHttpAndAdjustOffsets) {
                             metrics::OmniboxEventProto::INVALID_SPEC, false,
                             false, false, true,
                             ChromeAutocompleteSchemeClassifier(profile_.get()));
-    provider_->Start(input, false);
+    provider_->Start(input, false, false);
     const ACMatches& matches(provider_->matches());
     ASSERT_EQ(1U, matches.size()) << description;
     const AutocompleteMatch& match = matches[0];
@@ -472,3 +472,13 @@ TEST_F(BookmarkProviderTest, StripHttpAndAdjustOffsets) {
     }
   }
 }
+
+TEST_F(BookmarkProviderTest, DoesNotProvideMatchesOnFocus) {
+  AutocompleteInput input(base::ASCIIToUTF16("foo"),
+                          base::string16::npos, std::string(), GURL(),
+                          metrics::OmniboxEventProto::INVALID_SPEC, false,
+                          false, false, true,
+                          ChromeAutocompleteSchemeClassifier(profile_.get()));
+  provider_->Start(input, false, true);
+  EXPECT_TRUE(provider_->matches().empty());
+}