[HBD] Detect user-initiated Flash download in a new window

chrome/browser/chrome_content_browser_client.cc

 // 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.
 
 #include "chrome/browser/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 2235 matching lines @@
               ? APP_LOADED_IN_TAB_SOURCE_BACKGROUND_PAGE
               : APP_LOADED_IN_TAB_SOURCE_APP;
       UMA_HISTOGRAM_ENUMERATION("Extensions.AppLoadedInTab", source,
                                 APP_LOADED_IN_TAB_SOURCE_MAX);
     }
   }
 #endif
 
   HostContentSettingsMap* content_settings =
       ProfileIOData::FromResourceContext(context)->GetHostContentSettingsMap();
+
+#if defined(ENABLE_PLUGINS)
+  if (FlashDownloadInterception::ShouldStopFlashDownloadAction(
+          content_settings, opener_top_level_frame_url, target_url,
+          user_gesture)) {
+    // TODO(crbug.com/626728): Implement permission prompt logic.
+    return false;
+  }
+#endif
+
   BlockedWindowParams blocked_params(target_url,
                                      referrer,
                                      frame_name,
                                      disposition,
                                      features,
                                      user_gesture,
                                      opener_suppressed,
                                      render_process_id,
                                      opener_render_frame_id);
 
@@ skipping 902 matching lines @@
   if (channel <= kMaxDisableEncryptionChannel) {
     static const char* const kWebRtcDevSwitchNames[] = {
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)