Add a FrameHostMsg_BeginNavigation IPC

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 72dcc54196c110723416dacfaa8dc14141c6723a..870aeeccbdfadcdc2d43e439624b5943ba23c6a5 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -5,6 +5,7 @@
 #include "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/metrics/user_metrics_action.h"
@@ -43,6 +44,7 @@
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/common/content_constants.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/url_utils.h"
 #include "ui/accessibility/ax_tree.h"
@@ -852,9 +854,10 @@ void RenderFrameHostImpl::OnUpdateEncoding(const std::string& encoding_name) {
 
 void RenderFrameHostImpl::OnBeginNavigation(
     const FrameHostMsg_BeginNavigation_Params& params) {
-#if defined(USE_BROWSER_SIDE_NAVIGATION)
-  frame_tree_node()->render_manager()->OnBeginNavigation(params);
-#endif
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableBrowserSideNavigation)) {
+    frame_tree_node()->render_manager()->OnBeginNavigation(params);
+  }
 }
 
 void RenderFrameHostImpl::OnAccessibilityEvents(