AutoFill DCHECK in RenderViewHost::AutocompleteSuggestionsReturned fails.

chrome/browser/autofill/autofill_manager_unittest.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <vector>
 
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/scoped_vector.h"
 #include "base/string16.h"
@@ skipping 581 matching lines @@
   EXPECT_TRUE(GetAutoFillSuggestionsMessage(&page_id, &values, &labels));
   EXPECT_EQ(kPageID, page_id);
   ASSERT_EQ(2U, values.size());
   EXPECT_EQ(ASCIIToUTF16("Elvis"), values[0]);
   EXPECT_EQ(ASCIIToUTF16("Charles"), values[1]);
   ASSERT_EQ(2U, labels.size());
   EXPECT_EQ(string16(), labels[0]);
   EXPECT_EQ(string16(), labels[1]);
 }
 
+TEST_F(AutoFillManagerTest, GetFieldSuggestionsForAutocompleteOnly) {
+  FormData form;
+  CreateTestFormData(&form);
+
+  // Set up our FormStructures.
+  std::vector<FormData> forms;
+  forms.push_back(form);
+  autofill_manager_->FormsSeen(forms);
+
+  // The page ID sent to the AutoFillManager from the RenderView, used to send
+  // an IPC message back to the renderer.
+  const int kPageID = 1;
+  const int kAlternatePageID = 0;
+
+  webkit_glue::FormField field;
+  autofill_unittest::CreateTestFormField(
+      "First Name", "firstname", "", "text", &field);
+  EXPECT_TRUE(autofill_manager_->GetAutoFillSuggestions(kPageID, true, field));
+
+  // No suggestions provided, so send an empty vector as the results.
+  // This triggers the combined message send.
+  // In this case, we're simulating a cancel of Autocomplete with a different
+  // page ID and an empty vector of suggestions.
+  rvh()->AutocompleteSuggestionsReturned(kAlternatePageID,
+                                         std::vector<string16>());
+
+  // Test that we sent the right message to the renderer.
+  int page_id = 0;
+  std::vector<string16> values;
+  std::vector<string16> labels;
+  EXPECT_TRUE(GetAutoFillSuggestionsMessage(&page_id, &values, &labels));
+  EXPECT_EQ(kAlternatePageID, page_id);
+  ASSERT_EQ(0U, values.size());
+  ASSERT_EQ(0U, labels.size());
+}
+
 TEST_F(AutoFillManagerTest, GetFieldSuggestionsWithDuplicateValues) {
   FormData form;
   CreateTestFormData(&form);
 
   // Set up our FormStructures.
   std::vector<FormData> forms;
   forms.push_back(form);
   autofill_manager_->FormsSeen(forms);
 
   // |profile| will be owned by the mock PersonalDataManager.
@@ skipping 486 matching lines @@
   autofill_manager_->FormsSeen(forms);
 
   // Submit the form.
   autofill_manager_->FormSubmitted(form);
 
   // TODO(jhawkins): We can't use the InfoBar anymore to determine if we saved
   // fields.  Need to query the PDM.
 }
 
 }  // namespace