Add a flag to require a user gesture to add an entry to the back/forward list.

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 560 matching lines @@
 
 // Makes GPU sandbox failures fatal.
 const char kGpuSandboxFailuresFatal[]       = "gpu-sandbox-failures-fatal";
 
 // Causes the GPU process to display a dialog on launch.
 const char kGpuStartupDialog[]              = "gpu-startup-dialog";
 
 // Ignores certificate-related errors.
 const char kIgnoreCertificateErrors[]       = "ignore-certificate-errors";
 
+// Don't allow content to arbitrarily append to the back/forward list.
+// The page must prcoess a user gesture before an entry can be added.
+const char kHistoryEntryRequiresUserGesture[] =
+    "history-entry-requires-user-gesture";
+
 // These mappings only apply to the host resolver.
 const char kHostResolverRules[]             = "host-resolver-rules";
 
 // Ignores GPU blacklist.
 const char kIgnoreGpuBlacklist[]            = "ignore-gpu-blacklist";
 
 // Makes all APIs reflect the layout viewport.
 const char kInertVisualViewport[]           = "inert-visual-viewport";
 
 // Run the GPU process as a thread in the browser process.
@@ skipping 476 matching lines @@
 // the given directory. Used primarily to gather samples for IPC fuzzing.
 const char kIpcDumpDirectory[] = "ipc-dump-directory";
 
 // Specifies the testcase used by the IPC fuzzer.
 const char kIpcFuzzerTestcase[] = "ipc-fuzzer-testcase";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches