Implement WebViewDatabase's hasFormData API for chromium based webview.

components/autofill/browser/webdata/autofill_table_unittest.cc

 // Copyright (c) 2012 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/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/guid.h"
 #include "base/path_service.h"
@@ skipping 122 matching lines @@
   Time t1 = Time::Now();
 
   // Simulate the submission of a handful of entries in a field called "Name",
   // some more often than others.
   AutofillChangeList changes;
   FormFieldData field;
   field.name = ASCIIToUTF16("Name");
   field.value = ASCIIToUTF16("Superman");
   base::Time now = base::Time::Now();
   base::TimeDelta two_seconds = base::TimeDelta::FromSeconds(2);
+  EXPECT_FALSE(table_->HasFormElements());
   EXPECT_TRUE(table_->AddFormFieldValue(field, &changes));
+  EXPECT_TRUE(table_->HasFormElements());
   std::vector<base::string16> v;
   for (int i = 0; i < 5; i++) {
     field.value = ASCIIToUTF16("Clark Kent");
     EXPECT_TRUE(table_->AddFormFieldValueTime(field, &changes,
                                               now + i * two_seconds));
   }
   for (int i = 0; i < 3; i++) {
     field.value = ASCIIToUTF16("Clark Sutter");
     EXPECT_TRUE(table_->AddFormFieldValueTime(field, &changes,
                                               now + i * two_seconds));
@@ skipping 1170 matching lines @@
   ASSERT_EQ(expected_entries.size(), entry_set.size());
   AutofillEntrySetIterator it;
   for (it = entry_set.begin(); it != entry_set.end(); it++) {
     expected_entries.erase(*it);
   }
 
   EXPECT_EQ(0U, expected_entries.size());
 }
 
 }  // namespace autofill