Fix browser tests on Mac

headless/lib/headless_browser_browsertest.cc

 // Copyright 2016 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 <memory>
 
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/memory/ptr_util.h"
@@ skipping 361 matching lines @@
                   ->GetAsInteger(&screen_height));
   EXPECT_TRUE(EvaluateScript(web_contents, "window.innerWidth")
                   ->GetResult()
                   ->GetValue()
                   ->GetAsInteger(&window_width));
   EXPECT_TRUE(EvaluateScript(web_contents, "window.innerHeight")
                   ->GetResult()
                   ->GetValue()
                   ->GetAsInteger(&window_height));
 
+#if !defined(OS_MACOSX)
+  // On Mac headless does not override the screen dimensions, so they are
+  // left with the actual screen values.
   EXPECT_EQ(kDefaultOptions.window_size.width(), screen_width);
   EXPECT_EQ(kDefaultOptions.window_size.height(), screen_height);
+#endif  // !defined(OS_MACOSX)
   EXPECT_EQ(kDefaultOptions.window_size.width(), window_width);
   EXPECT_EQ(kDefaultOptions.window_size.height(), window_height);
 }
 
 namespace {
 
 // True if the request method is "safe" (per section 4.2.1 of RFC 7231).
 bool IsMethodSafe(const std::string& method) {
   return method == "GET" || method == "HEAD" || method == "OPTIONS" ||
          method == "TRACE";
@@ skipping 380 matching lines @@
       web_contents->browser_context()->GetPermissionManager();
   EXPECT_NE(nullptr, permission_manager);
 
   // Check that the permission manager returns ASK for a given permission type.
   EXPECT_EQ(blink::mojom::PermissionStatus::ASK,
             permission_manager->GetPermissionStatus(
                 content::PermissionType::NOTIFICATIONS, url, url));
 }
 
 }  // namespace headless