Standalone GN on mac

Without the mac_deployment_target_build_override variable in build.gni
the following error is produced.

ERROR at //build/config/mac/mac_sdk.gni:17:27: Undefined identifier
  mac_deployment_target = mac_deployment_target_build_override
                          ^-----------------------------------

Added needed gtest/gtest_mac.* files.

BUG=pdfium:106

Review URL: https://codereview.chromium.org/1907193002

1 files changed, 62 insertions, 0 deletions

diff --git a/testing/gtest_mac.h b/testing/gtest_mac.h
new file mode 100644
index 0000000000..0c0b6555a3
--- /dev/null
+++ b/testing/gtest_mac.h
@@ -0,0 +1,62 @@
+// 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.
+#ifndef TESTING_GTEST_MAC_H_
+#define TESTING_GTEST_MAC_H_
+#include <gtest/internal/gtest-port.h>
+#include <gtest/gtest.h>
+#ifdef GTEST_OS_MAC
+#import <Foundation/Foundation.h>
+namespace testing {
+namespace internal {
+// This overloaded version allows comparison between ObjC objects that conform
+// to the NSObject protocol. Used to implement {ASSERT|EXPECT}_NSEQ().
+GTEST_API_ AssertionResult CmpHelperNSEQ(const char* expected_expression,
+                                         const char* actual_expression,
+                                         id<NSObject> expected,
+                                         id<NSObject> actual);
+// This overloaded version allows comparison between ObjC objects that conform
+// to the NSObject protocol. Used to implement {ASSERT|EXPECT}_NSNE().
+GTEST_API_ AssertionResult CmpHelperNSNE(const char* expected_expression,
+                                         const char* actual_expression,
+                                         id<NSObject> expected,
+                                         id<NSObject> actual);
+#if !defined(GTEST_OS_IOS)
+// This overloaded version allows comparison between NSRect objects using
+// NSEqualRects. Used to implement {ASSERT|EXPECT}_NSEQ().
+GTEST_API_ AssertionResult CmpHelperNSEQ(const char* expected_expression,
+                                         const char* actual_expression,
+                                         const NSRect& expected,
+                                         const NSRect& actual);
+// This overloaded version allows comparison between NSRect objects using
+// NSEqualRects. Used to implement {ASSERT|EXPECT}_NSNE().
+GTEST_API_ AssertionResult CmpHelperNSNE(const char* expected_expression,
+                                         const char* actual_expression,
+                                         const NSRect& expected,
+                                         const NSRect& actual);
+// This overloaded version allows comparison between NSPoint objects using
+// NSEqualPoints. Used to implement {ASSERT|EXPECT}_NSEQ().
+GTEST_API_ AssertionResult CmpHelperNSEQ(const char* expected_expression,
+                                         const char* actual_expression,
+                                         const NSPoint& expected,
+                                         const NSPoint& actual);
+// This overloaded version allows comparison between NSPoint objects using
+// NSEqualPoints. Used to implement {ASSERT|EXPECT}_NSNE().
+GTEST_API_ AssertionResult CmpHelperNSNE(const char* expected_expression,
+                                         const char* actual_expression,
+                                         const NSPoint& expected,
+                                         const NSPoint& actual);
+#endif  // !GTEST_OS_IOS
+}  // namespace internal
+}  // namespace testing
+// Tests that [expected isEqual:actual].
+#define EXPECT_NSEQ(expected, actual) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNSEQ, expected, actual)
+#define EXPECT_NSNE(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNSNE, val1, val2)
+#define ASSERT_NSEQ(expected, actual) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNSEQ, expected, actual)
+#define ASSERT_NSNE(val1, val2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNSNE, val1, val2)
+#endif  // GTEST_OS_MAC
+#endif  // TESTING_GTEST_MAC_H_