Make content::FeaturePolicy implement WebFeaturePolicy, and use it in blink code

content/child/blink_platform_impl.h

Index: content/child/blink_platform_impl.h
diff --git a/content/child/blink_platform_impl.h b/content/child/blink_platform_impl.h
index 78a28a40b9a555417f6c1699a39dc571c8f2c0dc..bd33f51eedf36f193a542417a9daabcbd4717e7b 100644
--- a/content/child/blink_platform_impl.h
+++ b/content/child/blink_platform_impl.h
@@ -121,6 +121,15 @@ class CONTENT_EXPORT BlinkPlatformImpl
   // destructed.
   void SetCompositorThread(blink::scheduler::WebThreadBase* compositor_thread);
 
+  blink::WebFeaturePolicy* createFeaturePolicy(
+      const blink::WebFeaturePolicy* parentPolicy,
+      const blink::WebParsedFeaturePolicyHeader& containerPolicy,
+      const blink::WebParsedFeaturePolicyHeader& policyHeader,
+      const blink::WebSecurityOrigin& origin) override;
+  blink::WebFeaturePolicy* duplicateFeaturePolicyWithOrigin(
+      const blink::WebFeaturePolicy& policy,
+      const blink::WebSecurityOrigin& new_origin) override;
+
  private:
   void InternalInit();
   void WaitUntilWebThreadTLSUpdate(blink::scheduler::WebThreadBase* thread);