Add commands to manage tabs and contexts to Browser Domain

components/devtools_discovery/devtools_discovery_manager.h

Index: components/devtools_discovery/devtools_discovery_manager.h
diff --git a/components/devtools_discovery/devtools_discovery_manager.h b/components/devtools_discovery/devtools_discovery_manager.h
index 75657d46be6a32462680f60ab271d02da89ee56b..023e067a035e7993ee9499343e765130ae8a8dd7 100644
--- a/components/devtools_discovery/devtools_discovery_manager.h
+++ b/components/devtools_discovery/devtools_discovery_manager.h
@@ -10,6 +10,7 @@
 
 #include "base/macros.h"
 #include "base/memory/singleton.h"
+#include "base/values.h"
 #include "components/devtools_discovery/devtools_target_descriptor.h"
 
 namespace devtools_discovery {
@@ -39,6 +40,10 @@ class DevToolsDiscoveryManager {
   DevToolsTargetDescriptor::List GetDescriptors();
   std::unique_ptr<DevToolsTargetDescriptor> CreateNew(const GURL& url);
 
+  // Handles Browser.newPage only.
+  std::unique_ptr<base::DictionaryValue> HandleNewTargetCommand(
+      base::DictionaryValue* command_dict);
+
  private:
   friend struct base::DefaultSingletonTraits<DevToolsDiscoveryManager>;