Merge "floss: removing googletest manual build steps"

  libprotobuf-dev ninja-build generate-ninja protobuf-compiler \

  libre2-9 debmake \

  llvm libc++abi-dev \

  libre2-dev libdouble-conversion-dev

  libre2-dev libdouble-conversion-dev \

  libgtest-dev libgmock-dev libabsl-dev

```

You will also need a recent-ish version of Rust and Cargo. Please follow the

sudo dpkg -i outdir/libchrome/*.deb

```

The googletest packages provided by Debian/Ubuntu (libgmock-dev and

libgtest-dev) do not provide pkg-config files, so you can build your own

googletest using the steps below:

```sh

git clone https://github.com/google/googletest.git -b release-1.10.0

cd googletest        # Main directory of the cloned repository.

mkdir build          # Create a directory to hold the build output.

cd build

cmake ..             # Generate native build scripts for GoogleTest.

sudo make install -DCMAKE_INSTALL_PREFIX=/usr

# Optional steps if pkgconfig isn't installed to desired location

# Modify the source (/usr/lib/x86_64-linux-gnu) and target (/usr/lib) based on

# your local installation.

for f in $(ls /usr/lib/x86_64-linux-gnu/pkgconfig/{gtest,gmock}*); do \

  ln -sf $f /usr/lib/pkgconfig/$(basename $f);

done

```

### Rust dependencies

**Note**: Handled by `--run-bootstrap` option.