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

third_party/WebKit/Source/core/loader/MixedContentChecker.h

Index: third_party/WebKit/Source/core/loader/MixedContentChecker.h
diff --git a/third_party/WebKit/Source/core/loader/MixedContentChecker.h b/third_party/WebKit/Source/core/loader/MixedContentChecker.h
index b1100e79ab882ec943879713013455ee27fcc21d..adba7ed31374ccd6df039d3c3dd805338530c303 100644
--- a/third_party/WebKit/Source/core/loader/MixedContentChecker.h
+++ b/third_party/WebKit/Source/core/loader/MixedContentChecker.h
@@ -47,6 +47,12 @@ class KURL;
 class ResourceResponse;
 class SecurityOrigin;
 
+// Checks all sub-resource loads for mixed-content. Frame-level loads are
+// checked at the browser by MixedContentNavigationThrottle. Changes to this
+// class might need to be reflected on its browser counterpart.
+//
+// Current mixed content draft that drives this implementation:
+// https://w3c.github.io/webappsec-mixed-content/
 class CORE_EXPORT MixedContentChecker final {
   WTF_MAKE_NONCOPYABLE(MixedContentChecker);
   DISALLOW_NEW();
@@ -94,6 +100,15 @@ class CORE_EXPORT MixedContentChecker final {
                                      WebURLRequest::FrameType,
                                      WebURLRequest::RequestContext);
 
+  // Log to the frame console about found mixed content and report it to the CSP
+  // policy.
+  static void mixedContentFoundByTheBrowser(LocalFrame*,
+                                            const KURL& mainResourceUrl,
+                                            const KURL& mixedContentUrl,
+                                            WebURLRequest::RequestContext,
+                                            bool wasAllowed,
+                                            bool hadRedirect);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(MixedContentCheckerTest, HandleCertificateError);