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

content/shell/browser/shell.cc

Index: content/shell/browser/shell.cc
diff --git a/content/shell/browser/shell.cc b/content/shell/browser/shell.cc
index f25b9031a76ae83d48376a88c97361fd43013c85..1c4bb35352f7aef2c03b13ae762037e1ca770a40 100644
--- a/content/shell/browser/shell.cc
+++ b/content/shell/browser/shell.cc
@@ -37,6 +37,7 @@
 #include "content/shell/browser/shell_content_browser_client.h"
 #include "content/shell/browser/shell_devtools_frontend.h"
 #include "content/shell/browser/shell_javascript_dialog_manager.h"
+#include "content/shell/common/layout_test/layout_test_switches.h"
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/common/shell_switches.h"
 #include "media/media_features.h"
@@ -480,6 +481,23 @@ void Shell::ActivateContents(WebContents* contents) {
   contents->GetRenderViewHost()->GetWidget()->Focus();
 }
 
+bool Shell::ShouldAllowRunningInsecureContent(
+    content::WebContents* web_contents,
+    bool allowed_per_prefs,
+    const url::Origin& origin,
+    const GURL& resource_url) {
+  bool allowed_by_test = false;
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kRunLayoutTest)) {
+    const base::DictionaryValue& test_flags =
+        BlinkTestController::Get()
+            ->accumulated_layout_test_runtime_flags_changes();
+    test_flags.GetBoolean("running_insecure_content_allowed", &allowed_by_test);
+  }
+
+  return allowed_per_prefs || allowed_by_test;
+}
+
 gfx::Size Shell::GetShellDefaultSize() {
   static gfx::Size default_shell_size;
   if (!default_shell_size.IsEmpty())