Implement GetSandboxType() on all platforms and implement for all process types.

content/public/common/sandboxed_process_launcher_delegate.cc

Index: content/public/common/sandboxed_process_launcher_delegate.cc
diff --git a/content/public/common/sandboxed_process_launcher_delegate.cc b/content/public/common/sandboxed_process_launcher_delegate.cc
index b961c3ef9edc6001394a2487b53a84baafbeb933..22f892835c835f3ce7a56f7686bfc4cadb3ac2a6 100644
--- a/content/public/common/sandboxed_process_launcher_delegate.cc
+++ b/content/public/common/sandboxed_process_launcher_delegate.cc
@@ -23,12 +23,10 @@ bool SandboxedProcessLauncherDelegate::ShouldUseZygote() {
 base::EnvironmentMap SandboxedProcessLauncherDelegate::GetEnvironment() {
   return base::EnvironmentMap();
 }
+#endif
 
-#if defined(OS_MACOSX)
 SandboxType SandboxedProcessLauncherDelegate::GetSandboxType() {
   return SANDBOX_TYPE_INVALID;
 }
-#endif
 
-#endif
 }  // namespace content