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

content/browser/ppapi_plugin_process_host.cc

Index: content/browser/ppapi_plugin_process_host.cc
diff --git a/content/browser/ppapi_plugin_process_host.cc b/content/browser/ppapi_plugin_process_host.cc
index c59b70cbb94868ab47d13d097d3dbd290ef0d06f..b58c1d6e4d79f5264246e44ba34ecd54a0955c97 100644
--- a/content/browser/ppapi_plugin_process_host.cc
+++ b/content/browser/ppapi_plugin_process_host.cc
@@ -21,6 +21,7 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/pepper_plugin_info.h"
 #include "content/public/common/process_type.h"
+#include "content/public/common/sandbox_type.h"
 #include "content/public/common/sandboxed_process_launcher_delegate.h"
 #include "ipc/ipc_switches.h"
 #include "net/base/network_change_notifier.h"
@@ -78,6 +79,10 @@ class PpapiPluginSandboxedProcessLauncherDelegate
   base::ScopedFD TakeIpcFd() override { return ipc_fd_.Pass(); }
 #endif  // OS_WIN
 
+  SandboxType GetSandboxType() override {
+    return SANDBOX_TYPE_PPAPI;
+  }
+
  private:
 #if defined(OS_POSIX)
   const PepperPluginInfo& info_;