Run clang-format on Core

This copies over formatting changes from the Widevine CDM repository
that resulted from running clang-format with Google style on the
shared core/ directory. It also copies over some rewordings of log
messages that were made at the same time.

Aside from the changed log messages, this should not affect behavior
or functionality.

Change-Id: I69c57c188f7a79f30fa3517afeed17365929b6b6

libwvdrmengine/cdm/core/test/url_request.cpp

@@ -69,7 +69,6 @@ void ConcatenateChunkedResponse(const std::string http_response,
 
 }  // namespace
 
-
 namespace wvcdm {
 
 UrlRequest::UrlRequest(const std::string& url)