DevTools: specify trace event filter when installing trace callback

public/web/WebDevToolsAgentClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 65 matching lines @@
         virtual size_t objectSize(const void* ptr) const = 0;
     protected:
         virtual ~InstrumentedObjectSizeProvider() { }
     };
     virtual void dumpUncountedAllocatedObjects(const InstrumentedObjectSizeProvider*) { }
 
     typedef void (*TraceEventCallback)(char phase, const unsigned char*, const char* name, unsigned long long id,
         int numArgs, const char* const* argNames, const unsigned char* argTypes, const unsigned long long* argValues,
         unsigned char flags, double timestamp);
 
-    virtual void setTraceEventCallback(TraceEventCallback) { }
+    virtual void setTraceEventCallback(const WebString& categoryFilter, TraceEventCallback) { }
+    virtual void resetTraceEventCallback() { }
 
     virtual void startGPUEventsRecording() { }
     virtual void stopGPUEventsRecording() { }
 
     // Called to emulate device dimensions, scale factor and input. Window should
     // occupy the whole device screen, while the view should be located at |viewRect|.
     // x-coordinate of |screenRect| defines the left and right gutters' width,
     // y-coordinate defines the top and bottom gutters' height.
     // With |fitToView| set, contents should be scaled down to fit into embedder window.
     // All sizes are measured in device independent pixels.
     virtual void enableDeviceEmulation(
         const WebRect& screenRect, const WebRect& viewRect,
         float deviceScaleFactor, bool fitToView) { }
 
     // Cancel emulation started via |enableDeviceEmulation| call.
     virtual void disableDeviceEmulation() { }
 
 protected:
     ~WebDevToolsAgentClient() { }
 };
 
 } // namespace blink
 
 #endif