diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000..10f31a86f1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+src/chrome/android/profiles/afdo.prof
+src/gn/
+src/third_party/llvm-build/
+src/out/
+*.pyc