webui: Remove unused function declaration from gpu_internals_ui.cc

chrome/browser/ui/webui/gpu_internals_ui.cc

Index: chrome/browser/ui/webui/gpu_internals_ui.cc
diff --git a/chrome/browser/ui/webui/gpu_internals_ui.cc b/chrome/browser/ui/webui/gpu_internals_ui.cc
index 8fb021b220d69d02b0a399b1ed0060117b355f71..89f07ce09b1d75dc0c47de84fe7efd7bdf0dc475 100644
--- a/chrome/browser/ui/webui/gpu_internals_ui.cc
+++ b/chrome/browser/ui/webui/gpu_internals_ui.cc
@@ -459,11 +459,6 @@ class GpuMessageHandler
   Value* OnRequestLogMessages(const ListValue* list);
   Value* OnRequestCrashList(const ListValue* list);
 
-  // Executes the javascript function |function_name| in the renderer, passing
-  // it the argument |value|.
-  void CallJavascriptFunction(const std::wstring& function_name,
-                              const Value* value);
-
  private:
   scoped_refptr<CrashUploadList> crash_list_;
   bool crash_list_available_;