qtwebengine 5.15.2 doesn't build with GCC 10

In file included from gen/base/base_jumbo_12.cc:18:

./../../../../qtwebengine-everywhere-src-5.15.2/src/3rdparty/chromium/base/metrics/sparse_histogram.cc:21:16: error: redefinition of ‘constexpr const char {anonymous}::kHtmlNewLine []’

   21 | constexpr char kHtmlNewLine[] = "<br>";

      |                ^~~~~~~~~~~~

In file included from gen/base/base_jumbo_12.cc:5:

./../../../../qtwebengine-everywhere-src-5.15.2/src/3rdparty/chromium/base/metrics/histogram.cc:39:16: note: ‘constexpr const char {anonymous}::kHtmlNewLine [5]’ previously defined here

   39 | constexpr char kHtmlNewLine[] = "<br>";

      |                ^~~~~~~~~~~~

In file included from gen/base/base_jumbo_12.cc:18:

./../../../../qtwebengine-everywhere-src-5.15.2/src/3rdparty/chromium/base/metrics/sparse_histogram.cc:22:16: error: redefinition of ‘constexpr const char {anonymous}::kAsciiNewLine []’

   22 | constexpr char kAsciiNewLine[] = "\n";

      |                ^~~~~~~~~~~~~

In file included from gen/base/base_jumbo_12.cc:5:

./../../../../qtwebengine-everywhere-src-5.15.2/src/3rdparty/chromium/base/metrics/histogram.cc:40:16: note: ‘constexpr const char {anonymous}::kAsciiNewLine [2]’ previously defined here

   40 | constexpr char kAsciiNewLine[] = "\n";

      |                ^~~~~~~~~~~~~