Support Visual C++ PGO in Ninja generator

test/win/gyptest-link-ltcg.py

Index: test/win/gyptest-link-ltcg.py
===================================================================
--- test/win/gyptest-link-ltcg.py	(revision 0)
+++ test/win/gyptest-link-ltcg.py	(revision 0)
@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2013 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Make sure LTCG is working properly.
+"""
+
+import TestGyp
+
+import sys
+
+if sys.platform == 'win32':
+  test = TestGyp.TestGyp(formats=['msvs', 'ninja'])
+
+  CHDIR = 'linker-flags'
+  test.run_gyp('ltcg.gyp', chdir=CHDIR)
+
+  # Here we expect LTCG is able to inline functions beyond compile unit.
+  # Note: This marker is embedded in 'inline_test_main.cc'
+  INLINE_MARKER = '==== inlined ===='
+
+  # test 'LinkTimeCodeGenerationOptionDefault'
+  test.build('ltcg.gyp', 'test_ltcg_off', chdir=CHDIR)
+  test.run_built_executable('test_ltcg_off', chdir=CHDIR)
+  test.must_not_contain_any_line(test.stdout(), [INLINE_MARKER])
+
+  # test 'LinkTimeCodeGenerationOptionUse'
+  test.build('ltcg.gyp', 'test_ltcg_on', chdir=CHDIR)
+  test.must_contain_any_line(test.stdout(), ['Generating code'])
+  test.run_built_executable('test_ltcg_on', chdir=CHDIR)
+  test.must_contain_any_line(test.stdout(), [INLINE_MARKER])
+
+  test.pass_test()