DEPS: Add NodeJS binding dependencies

These are behind the new `dawn_node` flag, which can be enabled by using the new `scripts/standalone-with-node.gclient` file.

Bug: dawn:1123
Change-Id: Ia7ca715808e46b17f91338f56ffc6794d0104fd7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/64900
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>

.gitignore

@@ -17,6 +17,8 @@
 /third_party/jsoncpp
 /third_party/llvm-build
 /third_party/markupsafe
+/third_party/node-addon-api
+/third_party/node-api-headers
 /third_party/swiftshader
 /third_party/tint
 /third_party/vulkan-deps

DEPS

@@ -9,6 +9,7 @@ vars = {
   'swiftshader_git': 'https://swiftshader.googlesource.com',
 
   'dawn_standalone': True,
+  'dawn_node': False, # Also fetches dependencies required for building NodeJS bindings.
 }
 
 deps = {
@@ -140,6 +141,20 @@ deps = {
     'url': '{chromium_git}/chromium/src/third_party/abseil-cpp@789af048b388657987c59d4da406859034fe310f',
     'condition': 'dawn_standalone',
   },
+
+  # Dependencies required to build Dawn NodeJS bindings
+  'third_party/node-api-headers': {
+    'url': '{github_git}/nodejs/node-api-headers.git@d68505e4055ecb630e14c26c32e5c2c65e179bba',
+    'condition': 'dawn_node',
+  },
+  'third_party/node-addon-api': {
+    'url': '{github_git}/nodejs/node-addon-api.git@4a3de56c3e4ed0031635a2f642b27efeeed00add',
+    'condition': 'dawn_node',
+  },
+  'third_party/gpuweb': {
+    'url': '{github_git}/gpuweb/gpuweb.git@67edc187f5305a72456663c34d51153601b79f3b',
+    'condition': 'dawn_node',
+  },
 }
 
 hooks = [

scripts/standalone-with-node.gclient

@@ -0,0 +1,13 @@
+# Copy this file to <dawn clone dir>/.gclient to bootstrap gclient in a
+# standalone checkout of Dawn that also compiles dawn_node.
+
+solutions = [
+  { "name"        : ".",
+    "url"         : "https://dawn.googlesource.com/dawn",
+    "deps_file"   : "DEPS",
+    "managed"     : False,
+    "custom_vars" : {
+      "dawn_node" : True,
+    }
+  },
+]