[DevTools] Migrate DevToolsTracingHandler to generated handler.

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 b2f95b71d3cebe14e0a66561ccc5eb30f0d98f41..461468a6e089a1b33c9bdb2771d57add9af48aa0 100644
--- a/content/browser/devtools/protocol/devtools_protocol_client.h
+++ b/content/browser/devtools/protocol/devtools_protocol_client.h
@@ -17,6 +17,9 @@ class DevToolsProtocolClient {
   typedef base::Callback<void(scoped_refptr<DevToolsProtocol::Response>)>
       ResponseCallback;
 
+  typedef base::Callback<void(const std::string& message)>
+      RawMessageCallback;
+
   enum ResponseStatus {
     RESPONSE_STATUS_FALLTHROUGH,
     RESPONSE_STATUS_OK,
@@ -53,9 +56,14 @@ class DevToolsProtocolClient {
       scoped_refptr<DevToolsProtocol::Command> command,
       const std::string& message);
 
+  // Sends message to client, the caller is presumed to properly
+  // format the message. Do not use unless you must.
+  void SendRawMessage(const std::string& message);
+
  protected:
   DevToolsProtocolClient(const EventCallback& event_callback,
-                         const ResponseCallback& response_callback);
+                         const ResponseCallback& response_callback,
+                         const RawMessageCallback& raw_message_callback);

[caseq, 2014/10/13 13:01:27]

Let's have one callback instead of three, i.e. just RawMessageCallback and
implement others on top of it.

[dgozman, 2014/10/14 12:42:22]

Done.

 
   virtual ~DevToolsProtocolClient();
 
@@ -67,6 +75,7 @@ class DevToolsProtocolClient {
  private:
   EventCallback event_callback_;
   ResponseCallback response_callback_;
+  RawMessageCallback raw_message_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsProtocolClient);
 };