"Top Document Isolation" mode

content/public/common/content_switches.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 "build/build_config.h"
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
@@ skipping 800 matching lines @@
 // Upscale defaults to "best".
 const char kTabCaptureUpscaleQuality[]      = "tab-capture-upscale-quality";
 
 // Allows for forcing socket connections to http/https to use fixed ports.
 const char kTestingFixedHttpPort[]          = "testing-fixed-http-port";
 const char kTestingFixedHttpsPort[]         = "testing-fixed-https-port";
 
 // Type of the current test harness ("browser" or "ui").
 const char kTestType[]                      = "test-type";
 
+// Groups all out-of-process iframes to a different process from the process
+// of the top document. This is a performance isolation mode.
+const char kTopDocumentIsolation[] = "top-document-isolation";
+
 // Controls how text selection granularity changes when touch text selection
 // handles are dragged. Should be "character" or "direction". If not specified,
 // the platform default is used.
 const char kTouchTextSelectionStrategy[]    = "touch-selection-strategy";
 
 // Prioritizes the UI's command stream in the GPU process
 const char kUIPrioritizeInGpuProcess[] = "ui-prioritize-in-gpu-process";
 
 // Bypass the media stream infobar by selecting the default device for media
 // streams (e.g. WebRTC). Works with --use-fake-device-for-media-stream.
@@ skipping 216 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches