Improvements to tools/gn.py

build/toolchain/mac/BUILD.gn

Index: build/toolchain/mac/BUILD.gn
diff --git a/build/toolchain/mac/BUILD.gn b/build/toolchain/mac/BUILD.gn
index 7fedd88ba464430d3408fd0eca138f095d539783..b291f0050b6aef381afce0d9d1490dec2e819ef2 100644
--- a/build/toolchain/mac/BUILD.gn
+++ b/build/toolchain/mac/BUILD.gn
@@ -7,7 +7,6 @@
 # Linux.
 
 import("../goma.gni")
-import("//build/config/ios/ios_sdk.gni")
 import("//build/config/mac/mac_sdk.gni")
 
 assert(host_os == "mac")
@@ -208,32 +207,6 @@ template("mac_toolchain") {
   }
 }
 
-# Toolchain used for iOS device targets.
-mac_toolchain("ios_clang_arm") {
-  toolchain_cpu = "arm"
-  toolchain_os = "mac"
-  prefix = rebase_path("//third_party/llvm-build/Release+Asserts/bin",
-                       root_build_dir)
-  cc = "${goma_prefix}$prefix/clang"
-  cxx = "${goma_prefix}$prefix/clang++"
-  ld = cxx
-  is_clang = true
-  sysroot_flags = "-isysroot $ios_device_sdk_path -miphoneos-version-min=$ios_deployment_target"
-}
-
-# Toolchain used for iOS simulator targets.
-mac_toolchain("ios_clang_x64") {
-  toolchain_cpu = "x64"
-  toolchain_os = "mac"
-  prefix = rebase_path("//third_party/llvm-build/Release+Asserts/bin",
-                       root_build_dir)
-  cc = "${goma_prefix}$prefix/clang"
-  cxx = "${goma_prefix}$prefix/clang++"
-  ld = cxx
-  is_clang = true
-  sysroot_flags = "-isysroot $ios_simulator_sdk_path -mios-simulator-version-min=$ios_deployment_target"
-}
-
 # Toolchain used for Mac host targets.
 mac_toolchain("clang_x64") {
   toolchain_cpu = "x64"