Add commands to manage tabs and contexts to Browser Domain

content/browser/devtools/protocol/browser_handler.h

Index: content/browser/devtools/protocol/browser_handler.h
diff --git a/content/browser/devtools/protocol/browser_handler.h b/content/browser/devtools/protocol/browser_handler.h
index d4135bc1625a593a7116c734d1cf2744269cf748..fbc64c16a9b0789c7a0ca126d4009cc0ec903074 100644
--- a/content/browser/devtools/protocol/browser_handler.h
+++ b/content/browser/devtools/protocol/browser_handler.h
@@ -33,6 +33,15 @@ class BrowserHandler : public DevToolsAgentHostClient {
   void SetClient(std::unique_ptr<Client> client);
 
   using TargetInfos = std::vector<scoped_refptr<devtools::browser::TargetInfo>>;
+
+  Response NewContext(std::string* out_contextId);
+  Response CloseContext(const std::string& contextId, bool* out_success);
+  Response NewPage(const std::string& in_initialUrl,
+                   const int* in_width,
+                   const int* in_height,
+                   const std::string* in_context,
+                   std::string* out_targetId);
+  Response ClosePage(const std::string& targetId, bool* out_success);
   Response GetTargets(TargetInfos* infos);
   Response Attach(const std::string& targetId);
   Response Detach(const std::string& targetId);