Use grey triangle icon for HTTP when experiment enabled

Bug: 1008218
Change-Id: I1bdeaa0c31413d701c64acd748a1b196177b3fcc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1857047Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Livvie Lin <livvielin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705670}

components/omnibox/browser/DEPS

@@ -28,6 +28,7 @@ include_rules = [
   "+components/variations",
   "+components/vector_icons",
   "+content/public/browser",
+  "+content/public/common",
   "+extensions/common/constants.h",
   "+net",
   "+services/network/public/cpp",

components/omnibox/browser/location_bar_model_impl.cc

@@ -18,8 +18,10 @@
 #include "components/omnibox/common/omnibox_features.h"
 #include "components/prefs/pref_service.h"
 #include "components/search_engines/template_url_service.h"
+#include "components/security_state/core/features.h"
 #include "components/security_state/core/security_state.h"
 #include "components/strings/grit/components_strings.h"
+#include "content/public/common/origin_util.h"
 #include "net/cert/cert_status_flags.h"
 #include "net/cert/x509_certificate.h"
 #include "net/ssl/ssl_connection_status_flags.h"
@@ -179,6 +181,18 @@ LocationBarModelImpl::GetPageClassification(OmniboxFocusSource focus_source) {
 const gfx::VectorIcon& LocationBarModelImpl::GetVectorIcon() const {
 #if (!defined(OS_ANDROID) || BUILDFLAG(ENABLE_VR)) && !defined(OS_IOS)
   auto* const icon_override = delegate_->GetVectorIconOverride();
+  GURL url = GetURL();
+  bool http_danger_warning_enabled = false;
+  if (base::FeatureList::IsEnabled(
+          security_state::features::kMarkHttpAsFeature)) {
+    std::string parameter = base::GetFieldTrialParamValueByFeature(
+        security_state::features::kMarkHttpAsFeature,
+        security_state::features::kMarkHttpAsFeatureParameterName);
+    if (parameter ==
+        security_state::features::kMarkHttpAsParameterDangerWarning) {
+      http_danger_warning_enabled = true;
+    }
+  }
   if (icon_override)
     return *icon_override;
 
@@ -187,7 +201,18 @@ const gfx::VectorIcon& LocationBarModelImpl::GetVectorIcon() const {
 
   switch (GetSecurityLevel()) {
     case security_state::NONE:
+      // Show a danger triangle icon on HTTPS pages with passive mixed content
+      // when kMarkHttpAsParameterDangerWarning is enabled.
+      if (http_danger_warning_enabled && url.SchemeIsCryptographic()) {
+        return omnibox::kNotSecureWarningIcon;
+      }
+      return omnibox::kHttpIcon;
     case security_state::WARNING:
+      // When kMarkHttpAsParameterDangerWarning is enabled, show a danger
+      // triangle icon unless the page has a non-HTTPS secure origin.
+      if (http_danger_warning_enabled && !content::IsOriginSecure(url)) {
+        return omnibox::kNotSecureWarningIcon;
+      }
       return omnibox::kHttpIcon;
     case security_state::EV_SECURE:
     case security_state::SECURE: