Start adding tests for LevelDBWrapper, and fix a bunch of bugs.

content/test/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
@@ skipping 1077 matching lines @@
     "../browser/indexed_db/leveldb/leveldb_unittest.cc",
     "../browser/indexed_db/leveldb/mock_leveldb_factory.cc",
     "../browser/indexed_db/leveldb/mock_leveldb_factory.h",
     "../browser/indexed_db/list_set_unittest.cc",
     "../browser/indexed_db/mock_indexed_db_callbacks.cc",
     "../browser/indexed_db/mock_indexed_db_callbacks.h",
     "../browser/indexed_db/mock_indexed_db_database_callbacks.cc",
     "../browser/indexed_db/mock_indexed_db_database_callbacks.h",
     "../browser/indexed_db/mock_indexed_db_factory.cc",
     "../browser/indexed_db/mock_indexed_db_factory.h",
+    "../browser/leveldb_wrapper_impl_unittest.cc",
     "../browser/loader/async_resource_handler_unittest.cc",
     "../browser/loader/async_revalidation_driver_unittest.cc",
     "../browser/loader/async_revalidation_manager_unittest.cc",
     "../browser/loader/intercepting_resource_handler_unittest.cc",
     "../browser/loader/mime_sniffing_resource_handler_unittest.cc",
     "../browser/loader/mojo_async_resource_handler_unittest.cc",
     "../browser/loader/navigation_url_loader_unittest.cc",
     "../browser/loader/resource_buffer_unittest.cc",
     "../browser/loader/resource_dispatcher_host_unittest.cc",
     "../browser/loader/resource_loader_unittest.cc",
@@ skipping 266 matching lines @@
   deps = [
     ":content_test_mojo_bindings",
     ":test_support",
     "//base/test:test_support",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//cc:test_support",
     "//cc/ipc",
     "//cc/surfaces",
     "//components/display_compositor",
+    "//components/leveldb/public/cpp",
+    "//components/leveldb/public/interfaces",
     "//components/payments:payment_app",
     "//components/rappor:test_support",
     "//content:resources",
     "//content/app:both_for_content_tests",
     "//content/browser:for_content_tests",
     "//content/browser/cache_storage:cache_storage_proto",
     "//content/browser/notifications:notification_proto",
     "//content/browser/service_worker:service_worker_proto",
     "//content/browser/speech/proto",
     "//content/child:for_content_tests",
@@ skipping 331 matching lines @@
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }
 
 group("fuzzers") {
   deps = [
     "//content/test/fuzzer",
   ]
 }