PlzNavigate: Enforce 'frame-src' CSP on the browser.

third_party/WebKit/Source/web/FrameLoaderClientImpl.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 85 matching lines @@
   void dispatchDidReceiveTitle(const String&) override;
   void dispatchDidChangeIcons(IconType) override;
   void dispatchDidCommitLoad(HistoryItem*, HistoryCommitType) override;
   void dispatchDidFailProvisionalLoad(const ResourceError&,
                                       HistoryCommitType) override;
   void dispatchDidFailLoad(const ResourceError&, HistoryCommitType) override;
   void dispatchDidFinishDocumentLoad() override;
   void dispatchDidFinishLoad() override;
 
   void dispatchDidChangeThemeColor() override;
-  NavigationPolicy decidePolicyForNavigation(const ResourceRequest&,
-                                             DocumentLoader*,
-                                             NavigationType,
-                                             NavigationPolicy,
-                                             bool shouldReplaceCurrentEntry,
-                                             bool isClientRedirect,
-                                             HTMLFormElement*) override;
+  NavigationPolicy decidePolicyForNavigation(
+      const ResourceRequest&,
+      DocumentLoader*,
+      NavigationType,
+      NavigationPolicy,
+      bool shouldReplaceCurrentEntry,
+      bool isClientRedirect,
+      HTMLFormElement*,
+      ContentSecurityPolicyDisposition shouldBypassMainWorldCSP) override;
   void dispatchWillSendSubmitEvent(HTMLFormElement*) override;
   void dispatchWillSubmitForm(HTMLFormElement*) override;
   void didStartLoading(LoadStartType) override;
   void didStopLoading() override;
   void progressEstimateChanged(double progressEstimate) override;
   void loadURLExternally(const ResourceRequest&,
                          NavigationPolicy,
                          const String& suggestedName,
                          bool shouldReplaceCurrentEntry) override;
   void loadErrorPage(int reason) override;
@@ skipping 115 matching lines @@
 
 DEFINE_TYPE_CASTS(FrameLoaderClientImpl,
                   FrameLoaderClient,
                   client,
                   client->isFrameLoaderClientImpl(),
                   client.isFrameLoaderClientImpl());
 
 }  // namespace blink
 
 #endif