Autoroller: Support for rolling individual DEPS entries.

tools/autoroller/unittests/testdata/DEPS

Index: tools/autoroller/unittests/testdata/DEPS
diff --git a/tools/autoroller/unittests/testdata/DEPS b/tools/autoroller/unittests/testdata/DEPS
new file mode 100644
index 0000000000000000000000000000000000000000..3f76e62e1787e8b10e8138d6b876e6d95eb7b895
--- /dev/null
+++ b/tools/autoroller/unittests/testdata/DEPS
@@ -0,0 +1,28 @@
+# DEPS file for unit tests.
+
+vars = {
+  'chromium_git': 'https://chromium.googlesource.com',
+  'chromium_revision': '1b9c098a08e40114e44b6c1ec33ddf95c40b901d',
+}
+
+deps = {
+  # Entry that is a directory in Chromium, so we're using a Git subtree mirror for it.
+  'src/build':
+    Var('chromium_git') + '/chromium/src/build' + '@' + '52f7afeca991d96d68cf0507e20dbdd5b845691f',
+
+  # Entry that's also a DEPS entry in the Chromium DEPS file.
+  'src/buildtools':
+    Var('chromium_git') + '/chromium/buildtools.git' + '@' + '64e38f0cebdde27aa0cfb405f330063582f9ac76',
+
+  # Entry only present in WebRTC, not Chromium.
+  'src/third_party/gflags/src':
+    Var('chromium_git') + '/external/github.com/gflags/gflags@03bebcb065c83beff83d50ae025a55a4bf94dfca',
+}
+
+deps_os = {
+  # Entry only present in WebRTC, not Chromium.
+  'win': {
+    'src/third_party/winsdk_samples/src':
+      Var('chromium_git') + '/external/webrtc/deps/third_party/winsdk_samples_v71@e71b549167a665d7424d6f1dadfbff4b4aad1589',
+  },
+}