[HBD] Blanket BLOCK on all non-HTTP(s) and non-FILE URLs for Flash.

chrome/browser/plugins/plugin_utils.cc

 // Copyright 2016 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.
 
 #include "chrome/browser/plugins/plugin_utils.h"
 
 #include "base/values.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/common/plugin_utils.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "content/public/common/webplugininfo.h"
 #include "url/gurl.h"
+#include "url/origin.h"
 
 namespace {
 
 const char kFlashPluginID[] = "adobe-flash-player";
 
 void GetPluginContentSettingInternal(
     const HostContentSettingsMap* host_content_settings_map,
     bool use_javascript_setting,
-    const GURL& policy_url,
+    const url::Origin& main_frame_origin,
     const GURL& plugin_url,
     const std::string& resource,
     ContentSetting* setting,
     bool* uses_default_content_setting,
     bool* is_managed) {
+  GURL main_frame_url = main_frame_origin.GetURL();
   std::unique_ptr<base::Value> value;
   content_settings::SettingInfo info;
   bool uses_plugin_specific_setting = false;
   if (use_javascript_setting) {
     value = host_content_settings_map->GetWebsiteSetting(
-        policy_url, policy_url, CONTENT_SETTINGS_TYPE_JAVASCRIPT, std::string(),
-        &info);
+        main_frame_url, main_frame_url, CONTENT_SETTINGS_TYPE_JAVASCRIPT,
+        std::string(), &info);
   } else {
     content_settings::SettingInfo specific_info;
     std::unique_ptr<base::Value> specific_setting =
         host_content_settings_map->GetWebsiteSetting(
-            policy_url, plugin_url, CONTENT_SETTINGS_TYPE_PLUGINS, resource,
+            main_frame_url, plugin_url, CONTENT_SETTINGS_TYPE_PLUGINS, resource,
             &specific_info);
     content_settings::SettingInfo general_info;
     std::unique_ptr<base::Value> general_setting =
         host_content_settings_map->GetWebsiteSetting(
-            policy_url, plugin_url, CONTENT_SETTINGS_TYPE_PLUGINS,
+            main_frame_url, plugin_url, CONTENT_SETTINGS_TYPE_PLUGINS,
             std::string(), &general_info);
     // If there is a plugin-specific setting, we use it, unless the general
     // setting was set by policy, in which case it takes precedence.
     uses_plugin_specific_setting =
         specific_setting &&
         general_info.source != content_settings::SETTING_SOURCE_POLICY;
     if (uses_plugin_specific_setting) {
       value = std::move(specific_setting);
       info = specific_info;
     } else {
       value = std::move(general_setting);
       info = general_info;
     }
   }
   *setting = content_settings::ValueToContentSetting(value.get());
   if (uses_default_content_setting) {
     *uses_default_content_setting =
         !uses_plugin_specific_setting &&
         info.primary_pattern == ContentSettingsPattern::Wildcard() &&
         info.secondary_pattern == ContentSettingsPattern::Wildcard();
   }
   if (is_managed)
     *is_managed = info.source == content_settings::SETTING_SOURCE_POLICY;
+
+  // For non-JavaScript treated plugins (Flash): unless the user has explicitly
+  // ALLOWed plugins, return BLOCK for any non-HTTP and non-FILE origin.
+  if (!use_javascript_setting && *setting != CONTENT_SETTING_ALLOW &&
+      base::FeatureList::IsEnabled(features::kPreferHtmlOverPlugins) &&
+      !main_frame_url.SchemeIsHTTPOrHTTPS() && !main_frame_url.SchemeIsFile()) {
+    *setting = CONTENT_SETTING_BLOCK;
+  }
 }
 
 }  // namespace
 
 // static
 void PluginUtils::GetPluginContentSetting(
     const HostContentSettingsMap* host_content_settings_map,
     const content::WebPluginInfo& plugin,
-    const GURL& policy_url,
+    const url::Origin& main_frame_origin,
     const GURL& plugin_url,
     const std::string& resource,
     ContentSetting* setting,
     bool* uses_default_content_setting,
     bool* is_managed) {
-  GetPluginContentSettingInternal(host_content_settings_map,
-                                  ShouldUseJavaScriptSettingForPlugin(plugin),
-                                  policy_url, plugin_url, resource, setting,
-                                  uses_default_content_setting, is_managed);
+  GetPluginContentSettingInternal(
+      host_content_settings_map, ShouldUseJavaScriptSettingForPlugin(plugin),
+      main_frame_origin, plugin_url, resource, setting,
+      uses_default_content_setting, is_managed);
 }
 
 // static
 ContentSetting PluginUtils::GetFlashPluginContentSetting(
     const HostContentSettingsMap* host_content_settings_map,
-    const GURL& policy_url,
+    const url::Origin& main_frame_origin,
     const GURL& plugin_url,
     bool* is_managed) {
   ContentSetting plugin_setting = CONTENT_SETTING_DEFAULT;
-  GetPluginContentSettingInternal(
-      host_content_settings_map, false /* use_javascript_setting */, policy_url,
-      plugin_url, kFlashPluginID, &plugin_setting, nullptr, is_managed);
+  GetPluginContentSettingInternal(host_content_settings_map,
+                                  false /* use_javascript_setting */,
+                                  main_frame_origin, plugin_url, kFlashPluginID,
+                                  &plugin_setting, nullptr, is_managed);
   return plugin_setting;
 }