Revert of [DevTools] Filter any messages from previous sessions in DevToolsAgentHostImpl

content/browser/devtools/protocol/devtools_protocol_client.h

Index: content/browser/devtools/protocol/devtools_protocol_client.h
diff --git a/content/browser/devtools/protocol/devtools_protocol_client.h b/content/browser/devtools/protocol/devtools_protocol_client.h
index 780bc74aa7c32276816a260a66b0ebc292deb060..9297187f21c1778752372a2881912ab4c1bbe380 100644
--- a/content/browser/devtools/protocol/devtools_protocol_client.h
+++ b/content/browser/devtools/protocol/devtools_protocol_client.h
@@ -10,22 +10,16 @@
 
 namespace content {
 
-struct DevToolsCommandId {
-  static const int kNoId;
-
-  DevToolsCommandId(int call_id, int session_id)
-      : call_id(call_id), session_id(session_id) {}
-
-  int call_id;
-  int session_id;
-};
-
-class DevToolsProtocolDelegate;
+using DevToolsCommandId = int;
+class DevToolsProtocolHandler;
 class DevToolsProtocolDispatcher;
-class DevToolsProtocolHandler;
 
 class DevToolsProtocolClient {
  public:
+  typedef base::Callback<void(const std::string& message)>
+      RawMessageCallback;
+  static const DevToolsCommandId kNoId;
+
   struct Response {
    public:
     static Response FallThrough();
@@ -52,13 +46,12 @@
   bool SendError(DevToolsCommandId command_id,
                  const Response& response);
 
-  // Sends notification to client, the caller is presumed to properly
+  // Sends message to client, the caller is presumed to properly
   // format the message. Do not use unless you must.
-  void SendRawNotification(const std::string& message);
+  void SendRawMessage(const std::string& message);
 
-  void SendMessage(int session_id, const base::DictionaryValue& message);
-
-  explicit DevToolsProtocolClient(DevToolsProtocolDelegate* notifier);
+  explicit DevToolsProtocolClient(
+      const RawMessageCallback& raw_message_callback);
   virtual ~DevToolsProtocolClient();
 
  protected:
@@ -70,7 +63,9 @@
  private:
   friend class DevToolsProtocolDispatcher;
 
-  DevToolsProtocolDelegate* notifier_;
+  void SendMessage(const base::DictionaryValue& message);
+
+  RawMessageCallback raw_message_callback_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsProtocolClient);
 };