Now that googletest has moved to C++11, it should no longer
use NULL or 0 for the null pointer. This patch converts all
such usages to nullptr using clang-tidy.

This prevents LLVM from issuing -Wzero-as-null-pointer-constant
warnings.

PiperOrigin-RevId: 215814400

PiperOrigin-RevId: 215789971

Closes #1830

PiperOrigin-RevId: 215563532

Closes #1836

PiperOrigin-RevId: 215461025

Closes #1880

PiperOrigin-RevId: 215429534

Closes #1867

PiperOrigin-RevId: 215392714

Closes #1544
With refinements and changes

PiperOrigin-RevId: 215273083

Googletest export

Internal Change

PiperOrigin-RevId: 215236414

Add myself to the authors table.

PiperOrigin-RevId: 214822035

Add C++11 standard in the root CMakeLists.txt

Since we only one one MinGW left, lets enable it on PRs

Revert "[mingw] enable the unittests for gmock and gtest again"

Issue #1854: remove support for i386 for XCode 10

[mingw] enable the unittests for gmock and gtest again

Googletest export (and revert #1850)

Revert "Add clang format check to one of the builds"

Project import generated by Copybara.

PiperOrigin-RevId: 214456152