chromium: Merge the installPhase command strings

This wasn't done in 97570d30c7f to allow reusing chromiumBeta builds
(without having to perform any changes) in the meantime.

(cherry picked from commit 9ac31885527059cfc150343e576216e712408d1b)

pkgs/applications/networking/browsers/chromium/browser.nix

@@ -16,6 +16,7 @@ mkChromiumDerivation (base: rec {
     cp -v "$buildPath/"*.so "$buildPath/"*.pak "$buildPath/"*.bin "$libExecPath/"
     cp -v "$buildPath/icudtl.dat" "$libExecPath/"
     cp -vLR "$buildPath/locales" "$buildPath/resources" "$libExecPath/"
+    cp -v "$buildPath/crashpad_handler" "$libExecPath/"
     cp -v "$buildPath/chrome" "$libExecPath/$packageName"
 
     # Swiftshader
@@ -62,9 +63,7 @@ mkChromiumDerivation (base: rec {
       -e '/\[Desktop Entry\]/a\' \
       -e 'StartupWMClass=chromium-browser' \
       $out/share/applications/chromium-browser.desktop
-  '' + ''
-    cp -v "$buildPath/crashpad_handler" "$libExecPath/"
-  ''; # TODO: Merge
+  '';
 
   passthru = { inherit sandboxExecutableName; };