share all the needed linux code with OpenBSD in chrome and content

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 9789afdcd97f2d2715df9e410b6012adad953914..de27b0ffa3e9083286c756dcb0c25af9bf505d10 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -87,7 +87,7 @@
 #include "chrome/browser/chrome_browser_main_gtk.h"
 #endif
 
-#if defined(OS_LINUX)
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include "base/linux_util.h"
 #include "chrome/browser/crash_handler_host_linux.h"
 #endif
@@ -932,7 +932,7 @@ std::string ChromeContentBrowserClient::GetDefaultDownloadName() {
   return l10n_util::GetStringUTF8(IDS_DEFAULT_DOWNLOAD_FILENAME);
 }
 
-#if defined(OS_LINUX)
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
 int ChromeContentBrowserClient::GetCrashSignalFD(
     const CommandLine& command_line) {
   if (command_line.HasSwitch(switches::kExtensionProcess)) {
@@ -958,7 +958,7 @@ int ChromeContentBrowserClient::GetCrashSignalFD(
 
   return -1;
 }
-#endif  // defined(OS_LINUX)
+#endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
 
 #if defined(OS_WIN)
 const wchar_t* ChromeContentBrowserClient::GetResourceDllName() {