Implement feature policy checks in the browser process

chrome/browser/permissions/permission_context_base.h

Index: chrome/browser/permissions/permission_context_base.h
diff --git a/chrome/browser/permissions/permission_context_base.h b/chrome/browser/permissions/permission_context_base.h
index 72ef40eee34a40502376ba08970940774901d7b8..e50a900b1bed6053e7ba723a282c3ad010cdfb8c 100644
--- a/chrome/browser/permissions/permission_context_base.h
+++ b/chrome/browser/permissions/permission_context_base.h
@@ -16,6 +16,7 @@
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "components/keyed_service/core/keyed_service.h"
+#include "third_party/WebKit/public/platform/WebFeaturePolicyFeature.h"
 
 #if defined(OS_ANDROID)
 class PermissionQueueController;
@@ -58,7 +59,8 @@ using BrowserPermissionCallback = base::Callback<void(ContentSetting)>;
 class PermissionContextBase : public KeyedService {
  public:
   PermissionContextBase(Profile* profile,
-                        const ContentSettingsType content_settings_type);
+                        ContentSettingsType content_settings_type,
+                        blink::WebFeaturePolicyFeature feature_policy_feature);
   ~PermissionContextBase() override;
 
   // A field trial used to enable the global permissions kill switch.
@@ -180,6 +182,8 @@ class PermissionContextBase : public KeyedService {
  private:
   friend class PermissionContextBaseTests;
 
+  bool PermissionAllowedByFeaturePolicy(content::RenderFrameHost* rfh) const;
+
   // Called when a request is no longer used so it can be cleaned up.
   void CleanUpRequest(const PermissionRequestID& id);
 
@@ -204,6 +208,7 @@ class PermissionContextBase : public KeyedService {
 
   Profile* profile_;
   const ContentSettingsType content_settings_type_;
+  const blink::WebFeaturePolicyFeature feature_policy_feature_;
 #if defined(OS_ANDROID)
   std::unique_ptr<PermissionQueueController> permission_queue_controller_;
 #endif