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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebMixedContent_h
 #define WebMixedContent_h
 
+#include "public/platform/WebMixedContentContextType.h"
 #include "public/platform/WebURLRequest.h"
 
 namespace blink {
 
-// Types and helper functions related to mixed content checks.
+// Helper functions related to mixed content checks.
 class WebMixedContent {
  public:
-  enum class ContextType {
-    NotMixedContent,
-    Blockable,
-    OptionallyBlockable,
-    ShouldBeBlockable,
-  };
-
-  BLINK_PLATFORM_EXPORT static ContextType contextTypeFromRequestContext(
-      WebURLRequest::RequestContext,
-      bool strictMixedContentCheckingForPlugin);
-
-  BLINK_PLATFORM_EXPORT static const char* requestContextName(
-      WebURLRequest::RequestContext);
+  BLINK_PLATFORM_EXPORT static WebMixedContentContextType
+  contextTypeFromRequestContext(WebURLRequest::RequestContext,
+                                bool strictMixedContentCheckingForPlugin);
 };
 
 }  // namespace blink
 
 #endif  // WebMixedContent_h