Improve inheritance support in the CEF API (issue #1623).

- Support single parent inheritance in CEF API classes.
- Support non-virtual inheritance in CEF API classes.
- Support translation of CEF API sub-directories.
- Add test sub-directories for testing-only functionality that will be
  available to unit tests but not exposed via the binary distribution.
- Add unit tests for the translator tool.
- Fix parsing of template parameter types that include commas.

libcef_dll/ctocpp/callback_ctocpp.h

@@ -27,14 +27,12 @@
 class CefCallbackCToCpp
     : public CefCToCpp<CefCallbackCToCpp, CefCallback, cef_callback_t> {
  public:
-  explicit CefCallbackCToCpp(cef_callback_t* str)
-      : CefCToCpp<CefCallbackCToCpp, CefCallback, cef_callback_t>(str) {}
+  CefCallbackCToCpp();
 
-  // CefCallback methods
-  virtual void Continue() OVERRIDE;
-  virtual void Cancel() OVERRIDE;
+  // CefCallback methods.
+  void Continue() OVERRIDE;
+  void Cancel() OVERRIDE;
 };
 
 #endif  // USING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CTOCPP_CALLBACK_CTOCPP_H_
-