Change cookbook to map target_arch to target_cpu
target_arch was listed as the gn equivalent of target_arch. This is
wrong.
BUG=570145
Review URL: https://codereview.chromium.org/1568623002
Cr-Original-Commit-Position: refs/heads/master@{#367912}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: ff69eea6e2d53fab7acf55b3eb8cd554789feda2
diff --git a/tools/gn/docs/cookbook.md b/tools/gn/docs/cookbook.md
index 3f9f1f4..7bec8cb 100644
--- a/tools/gn/docs/cookbook.md
+++ b/tools/gn/docs/cookbook.md
@@ -190,7 +190,7 @@
| `msan` (0/1) | `is_msan` (true/false) | `//build/config/sanitizers/sanitizers.gni` |
| `SDKROOT` (Mac) | `sysroot` | `//build/config/sysroot.gni` |
| `sysroot` | `sysroot` | `//build/config/sysroot.gni` |
-| `target_arch` ("ia32"/"x64"/"arm"/"mipsel") | `target_arch` ("x86"/"x64"/"arm"/"mipsel") | (global) |
+| `target_arch` ("ia32"/"x64"/"arm"/"mipsel") | `target_cpu` ("x86"/"x64"/"arm"/"mipsel") | (global) |
| `toolkit_views` (0/1) | `toolkit_views` | `//build/config/ui.gni` |
| `tsan` (0/1) | `is_tsan` (true/false) | `//build/config/sanitizers/sanitizers.gni` |
| `windows_sdk_path` | `windows_sdk_path` | (internal to `//build/config/win/BUILD.gn`) |
