PlzNavigate: Move navigation-level mixed content checks to the browser.

third_party/WebKit/public/platform/WebMixedContent.h

 /*
  * Copyright (C) 2016 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 // Types and helper functions related to mixed content checks.
 class WebMixedContent {
  public:
   enum class ContextType {
     NotMixedContent,
     Blockable,
     OptionallyBlockable,
     ShouldBeBlockable,
   };
 
   BLINK_PLATFORM_EXPORT static ContextType contextTypeFromRequestContext(

[jam, 2017/01/06 04:49:40]

we should separate this static method into a different header than the enum, so
that the browser only includes the header with enum and no one accidentally
changes it to call the method from the browser.

[carlosk, 2017/01/10 02:10:44]

Done.

       WebURLRequest::RequestContext,
       bool strictMixedContentCheckingForPlugin);
-
-  BLINK_PLATFORM_EXPORT static const char* requestContextName(
-      WebURLRequest::RequestContext);
 };
 
 }  // namespace blink
 
 #endif  // WebMixedContent_h