media: Use PlatformVerificationDialog in PermissionContextBase on ChromeOS.

chrome/browser/content_settings/permission_context_base.h

Index: chrome/browser/content_settings/permission_context_base.h
diff --git a/chrome/browser/content_settings/permission_context_base.h b/chrome/browser/content_settings/permission_context_base.h
index d2370c7a585f9fbc5d92243d18fb7d92ba4b9694..b7dfa5692eeee1297030d39eb2945143abdfb159 100644
--- a/chrome/browser/content_settings/permission_context_base.h
+++ b/chrome/browser/content_settings/permission_context_base.h
@@ -15,6 +15,10 @@
 #include "components/keyed_service/core/keyed_service.h"
 #include "url/gurl.h"
 
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/attestation/platform_verification_flow.h"
+#endif
+
 class PermissionQueueController;
 class PermissionRequestID;
 class Profile;
@@ -123,6 +127,15 @@ class PermissionContextBase : public KeyedService {
   // Called when a bubble is no longer used so it can be cleaned up.
   void CleanUpBubble(const PermissionRequestID& id);
 
+#if defined(OS_CHROMEOS)
+  typedef base::Callback<void(bool /* persist */, bool /* allowed */)>
+      PermissionCallback;
+  void OnPlatformVerificationResult(
+      const PermissionCallback& permission_callback,
+      chromeos::attestation::PlatformVerificationFlow::ConsentResponse
+          response);
+#endif
+
   Profile* profile_;
   const ContentSettingsType permission_type_;
   scoped_ptr<PermissionQueueController> permission_queue_controller_;