Clean up some nits in base::NativeLibrary.

base/native_library_unittest.cc

 // Copyright 2015 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 "base/files/file_path.h"
 #include "base/native_library.h"
+#include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 const FilePath::CharType kDummyLibraryPath[] =
     FILE_PATH_LITERAL("dummy_library");
 
 TEST(NativeLibraryTest, LoadFailure) {
   NativeLibraryLoadError error;
-  NativeLibrary library =
-      LoadNativeLibrary(FilePath(kDummyLibraryPath), &error);
-  EXPECT_TRUE(library == nullptr);
+  EXPECT_FALSE(LoadNativeLibrary(FilePath(kDummyLibraryPath), &error));
   EXPECT_FALSE(error.ToString().empty());
 }
 
 // |error| is optional and can be null.
 TEST(NativeLibraryTest, LoadFailureWithNullError) {
-  NativeLibrary library =
-      LoadNativeLibrary(FilePath(kDummyLibraryPath), nullptr);
-  EXPECT_TRUE(library == nullptr);
+  EXPECT_FALSE(LoadNativeLibrary(FilePath(kDummyLibraryPath), nullptr));
+}
+
+TEST(NativeLibraryTest, GetNativeLibraryName) {
+  const char kExpectedName[] =
+#if defined(OS_IOS)
+      "mylib";
+#elif defined(OS_MACOSX)
+      "mylib.dylib";
+#elif defined(OS_POSIX)
+      "libmylib.so";
+#elif defined(OS_WIN)
+      "mylib.dll";
+#endif
+  EXPECT_EQ(ASCIIToUTF16(kExpectedName),
+            GetNativeLibraryName(ASCIIToUTF16("mylib")));
 }
 
 }  // namespace base