Add configuration flag to chromium: hiDPISupport

By default, hiDPISupport is disabled.

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

@@ -27,6 +27,7 @@
 , proprietaryCodecs ? true
 , cupsSupport ? false
 , pulseSupport ? false, pulseaudio ? null
+, hiDPISupport ? false
 
 , source
 , plugins
@@ -162,6 +163,7 @@ let
       linux_sandbox_chrome_path="${libExecPath}/${packageName}";
       werror = "";
       clang = false;
+      enable_hidpi = hiDPISupport;
 
       # Google API keys, see:
       #   http://www.chromium.org/developers/how-tos/api-keys

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

@@ -12,6 +12,7 @@
 , enablePepperPDF ? false
 , cupsSupport ? false
 , pulseSupport ? false
+, hiDPISupport ? false
 }:
 
 let
@@ -27,7 +28,7 @@ let
     mkChromiumDerivation = callPackage ./common.nix {
       inherit enableSELinux enableNaCl useOpenSSL gnomeSupport
               gnomeKeyringSupport proprietaryCodecs cupsSupport
-              pulseSupport;
+              pulseSupport hiDPISupport;
     };
 
     browser = callPackage ./browser.nix { };

pkgs/top-level/all-packages.nix

@@ -8522,6 +8522,7 @@ let
     pulseSupport = config.pulseaudio or true;
     enablePepperFlash = config.chromium.enablePepperFlash or false;
     enablePepperPDF = config.chromium.enablePepperPDF or false;
+    hiDPISupport = config.chromium.hiDPISupport or false;
   };
 
   chromiumBeta = lowPrio (chromium.override { channel = "beta"; });