Revert of Remove setVoiceSearchSupported part of EmbeddedSearch SearchBox API.

chrome/browser/ui/search/search_model_unittest.cc

Index: chrome/browser/ui/search/search_model_unittest.cc
diff --git a/chrome/browser/ui/search/search_model_unittest.cc b/chrome/browser/ui/search/search_model_unittest.cc
index 565b1cd41aa101e0811ebda70b363aa031ea6515..646639e3d8698daec1defac9cad15b825b932bd4 100644
--- a/chrome/browser/ui/search/search_model_unittest.cc
+++ b/chrome/browser/ui/search/search_model_unittest.cc
@@ -141,3 +141,17 @@
   mock_observer.VerifyNotificationCount(1);
   EXPECT_TRUE(model->state() == expected_new_state);
 }
+
+TEST_F(SearchModelTest, UpdateVoiceSearchSupported) {
+  mock_observer.VerifyNotificationCount(0);
+  EXPECT_FALSE(model->voice_search_supported());
+
+  SearchModel::State expected_old_state = model->state();
+  SearchModel::State expected_new_state(model->state());
+  expected_new_state.voice_search_supported = true;
+
+  model->SetVoiceSearchSupported(true);
+  mock_observer.VerifySearchModelStates(expected_old_state, expected_new_state);
+  mock_observer.VerifyNotificationCount(1);
+  EXPECT_TRUE(model->voice_search_supported());
+}