ppapi: PPB_VpnProvider: Implement Service Helper

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 15dd1d7bbd8344367abb5b46e521c658a624cb30..64199ef1e5255a16d6ca494c4306e394b9a3fc73 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -152,6 +152,7 @@
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/storage_partition.h"
+#include "content/public/browser/vpn_service_proxy.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/child_process_host.h"
 #include "content/public/common/content_descriptors.h"
@@ -2515,6 +2516,17 @@ bool ChromeContentBrowserClient::IsPepperVpnProviderAPIAllowed(
 #endif
 }
 
+std::unique_ptr<content::VpnServiceProxy>
+ChromeContentBrowserClient::GetVpnServiceProxy(
+    content::BrowserContext* browser_context) {
+#if defined(ENABLE_EXTENSIONS)
+  return ChromeContentBrowserClientExtensionsPart::GetVpnServiceProxy(
+      browser_context);
+#else
+  return nullptr;
+#endif
+}
+
 ui::SelectFilePolicy* ChromeContentBrowserClient::CreateSelectFilePolicy(
     WebContents* web_contents) {
   return new ChromeSelectFilePolicy(web_contents);