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

content/content_browser.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/components.gyp:display_compositor',
@@ skipping 746 matching lines @@
       'browser/frame_host/frame_tree.cc',
       'browser/frame_host/frame_tree.h',
       'browser/frame_host/frame_tree_node.cc',
       'browser/frame_host/frame_tree_node.h',
       'browser/frame_host/frame_tree_node_blame_context.cc',
       'browser/frame_host/frame_tree_node_blame_context.h',
       'browser/frame_host/interstitial_page_impl.cc',
       'browser/frame_host/interstitial_page_impl.h',
       'browser/frame_host/interstitial_page_navigator_impl.cc',
       'browser/frame_host/interstitial_page_navigator_impl.h',
+      'browser/frame_host/mixed_content_navigation_throttle.cc',
+      'browser/frame_host/mixed_content_navigation_throttle.h',
       'browser/frame_host/navigation_controller_android.cc',
       'browser/frame_host/navigation_controller_android.h',
       'browser/frame_host/navigation_controller_delegate.h',
       'browser/frame_host/navigation_controller_impl.cc',
       'browser/frame_host/navigation_controller_impl.h',
       'browser/frame_host/navigation_entry_impl.cc',
       'browser/frame_host/navigation_entry_impl.h',
       'browser/frame_host/navigation_entry_screenshot_manager.cc',
       'browser/frame_host/navigation_entry_screenshot_manager.h',
       'browser/frame_host/navigation_handle_impl.cc',
@@ skipping 1385 matching lines @@
       ],
     }],
     ['OS != "mac" and OS != "android"', {
       'sources!': [
         'browser/gpu/gpu_surface_tracker.cc',
         'browser/gpu/gpu_surface_tracker.h',
       ],
     }],
   ],
 }