Adding Navigation Throttles to DevTools

content/browser/devtools/render_frame_devtools_agent_host.h

Index: content/browser/devtools/render_frame_devtools_agent_host.h
diff --git a/content/browser/devtools/render_frame_devtools_agent_host.h b/content/browser/devtools/render_frame_devtools_agent_host.h
index e9ae1483b9e4ec57effb54dfdfb745f91a2470c9..2cee921cdcbd2a5050d06eaec175b0667c1da21d 100644
--- a/content/browser/devtools/render_frame_devtools_agent_host.h
+++ b/content/browser/devtools/render_frame_devtools_agent_host.h
@@ -36,6 +36,7 @@ class DevToolsFrameTraceRecorder;
 class DevToolsProtocolHandler;
 class FrameTreeNode;
 class NavigationHandle;
+class NavigationThrottle;
 class RenderFrameHostImpl;
 
 namespace devtools {
@@ -64,6 +65,8 @@ class CONTENT_EXPORT RenderFrameDevToolsAgentHost
   static void OnBeforeNavigation(RenderFrameHost* current,
                                  RenderFrameHost* pending);
   static void OnBeforeNavigation(NavigationHandle* navigation_handle);
+  static std::unique_ptr<NavigationThrottle> GetThrottleForNavigation(
+      NavigationHandle* navigation_handle);
 
   void SynchronousSwapCompositorFrame(
       cc::CompositorFrameMetadata frame_metadata);