Reland "Make gclient ready for the Blink (DEPS to main project)"

testing_support/fake_repos.py

Index: testing_support/fake_repos.py
diff --git a/testing_support/fake_repos.py b/testing_support/fake_repos.py
index 1b77bc86650ae3979f74ed091f11395694288af8..3f908441dab3c39cd9f2682d978024d90ce23922 100755
--- a/testing_support/fake_repos.py
+++ b/testing_support/fake_repos.py
@@ -828,6 +828,40 @@ class FakeRepoSkiaDEPS(FakeReposBase):
     })
 
 
+class FakeRepoBlinkDEPS(FakeReposBase):
+  """Simulates the Blink DEPS transition in Chrome."""
+
+  NB_GIT_REPOS = 2
+  DEPS_pre = 'deps = {"src/third_party/WebKit": "%(git_base)srepo_2",}'
+  DEPS_post = 'deps = {}'
+
+  def populateGit(self):
+    # Blink repo.
+    self._commit_git('repo_2', {
+        'OWNERS': 'OWNERS-pre',
+        'Source/exists_always': '_ignored_',
+        'Source/exists_before_but_not_after': '_ignored_',
+    })
+
+    # Chrome repo.
+    self._commit_git('repo_1', {
+        'DEPS': self.DEPS_pre % {'git_base': self.git_base},
+        'myfile': 'myfile@1',
+        '.gitignore': '/third_party/WebKit',
+    })
+    self._commit_git('repo_1', {
+        'DEPS': self.DEPS_post % {'git_base': self.git_base},
+        'myfile': 'myfile@2',
+        '.gitignore': '',
+        'third_party/WebKit/OWNERS': 'OWNERS-post',
+        'third_party/WebKit/Source/exists_always': '_ignored_',
+        'third_party/WebKit/Source/exists_after_but_not_before': '_ignored',
+    })
+
+  def populateSvn(self):
+    raise NotImplementedError()
+
+
 class FakeReposTestBase(trial_dir.TestCase):
   """This is vaguely inspired by twisted."""
   # Static FakeRepos instances. Lazy loaded.