Updated .gitmodules for dawn and added it to
.gitignore

Change-Id: Ibf008da1fb415d102b3d97c1b92f00332c949aba
diff --git a/.gitignore b/.gitignore
index 0154d06..c77b5a1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@
 /build
 /buildtools
 /testing
+/third_party/dawn
 /third_party/abseil-cpp/
 /third_party/angle
 /third_party/binutils
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..7e7a598
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "third_party/dawn"]
+	path = third_party/dawn
+	url = https://dawn.googlesource.com/dawn.git
+[submodule "third_party/glfw"]
+	path = third_party/glfw
+	url = https://chromium.googlesource.com/external/github.com/glfw/glfw
diff --git a/third_party/dawn b/third_party/dawn
new file mode 160000
index 0000000..18ac67f
--- /dev/null
+++ b/third_party/dawn
@@ -0,0 +1 @@
+Subproject commit 18ac67fc72dfff47efec97c2a8bcf654a13a9e37
diff --git a/third_party/glfw b/third_party/glfw
new file mode 160000
index 0000000..62e175e
--- /dev/null
+++ b/third_party/glfw
@@ -0,0 +1 @@
+Subproject commit 62e175ef9fae75335575964c845a302447c012c7