Update to Chromium revision 0bfd25d4 (#381305)

- Delete include/cef_runnable.h (issue #1336).
- Build the cef_unittests target using all Chromium headers. Add a
  USING_CHROMIUM_INCLUDES define and libcef_dll_wrapper_unittests
  target to support this. This change avoids compile errors due to
  the divergence of CEF and Chromium base/ header implementations.
  The libcef_dll_wrapper sources must now compile successfully with
  both CEF and Chromium base/ headers (issue #1632).
- The onbeforeunload message specified via JavaScript is no longer
  passed to the client (see http://crbug.com/587940).

include/base/cef_callback.h

@@ -37,10 +37,10 @@
 // This can happen in cases where Chromium code is used directly by the
 // client application. When using Chromium code directly always include
 // the Chromium header first to avoid type conflicts.
-#elif defined(BUILDING_CEF_SHARED)
+#elif defined(USING_CHROMIUM_INCLUDES)
 // When building CEF include the Chromium header directly.
 #include "base/callback.h"
-#else  // !BUILDING_CEF_SHARED
+#else  // !USING_CHROMIUM_INCLUDES
 // The following is substantially similar to the Chromium implementation.
 // If the Chromium implementation diverges the below implementation should be
 // updated to match.
@@ -802,6 +802,6 @@ typedef Callback<void(void)> Closure;
 
 }  // namespace base
 
-#endif  // !BUILDING_CEF_SHARED
+#endif  // !USING_CHROMIUM_INCLUDES
 
 #endif  // CEF_INCLUDE_BASE_CEF_CALLBACK_H_