DEPS: Sync Git subtree mirrors instead of symlinking into chromium/src

tools-webrtc/autoroller/roll_deps.py

Index: tools-webrtc/autoroller/roll_deps.py
diff --git a/tools-webrtc/autoroller/roll_deps.py b/tools-webrtc/autoroller/roll_deps.py
index 1bfcaee701c12139048c658847e859bd02b16a1d..f3287a8608c23e17daadb8a74cfc03d284303167 100755
--- a/tools-webrtc/autoroller/roll_deps.py
+++ b/tools-webrtc/autoroller/roll_deps.py
@@ -23,7 +23,7 @@ import urllib
 # Skip these dependencies (list without solution name prefix).
 DONT_AUTOROLL_THESE = [
   'src/third_party/gflags/src',
-  'src/third_party/winsdk_samples/src',
+  'src/third_party/winsdk_samples',
 ]
 
 WEBRTC_URL = 'https://chromium.googlesource.com/external/webrtc'
@@ -40,7 +40,6 @@ SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 CHECKOUT_SRC_DIR = os.path.realpath(os.path.join(SCRIPT_DIR, os.pardir,
                                                  os.pardir))
 CHECKOUT_ROOT_DIR = os.path.realpath(os.path.join(CHECKOUT_SRC_DIR, os.pardir))
-CHROMIUM_CHECKOUT_SRC_DIR = os.path.join(CHECKOUT_SRC_DIR, 'chromium', 'src')
 
 sys.path.append(CHECKOUT_SRC_DIR)
 import setup_links
@@ -51,8 +50,8 @@ find_depot_tools.add_depot_tools_to_path()
 from gclient import GClientKeywords
 
 CLANG_UPDATE_SCRIPT_URL_PATH = 'tools/clang/scripts/update.py'
-CLANG_UPDATE_SCRIPT_LOCAL_PATH = os.path.join('tools', 'clang', 'scripts',
-                                              'update.py')
+CLANG_UPDATE_SCRIPT_LOCAL_PATH = os.path.join(CHECKOUT_SRC_DIR, 'tools',
+                                              'clang', 'scripts', 'update.py')
 
 DepsEntry = collections.namedtuple('DepsEntry', 'path url revision')
 ChangedDep = collections.namedtuple('ChangedDep',
@@ -297,9 +296,7 @@ def CalculateChangedClang(new_cr_rev):
         return match.group(1)
     raise RollError('Could not parse Clang revision!')
 
-  chromium_src_path = os.path.join(CHROMIUM_CHECKOUT_SRC_DIR,
-                                   CLANG_UPDATE_SCRIPT_LOCAL_PATH)
-  with open(chromium_src_path, 'rb') as f:
+  with open(CLANG_UPDATE_SCRIPT_LOCAL_PATH, 'rb') as f:
     current_lines = f.readlines()
   current_rev = GetClangRev(current_lines)
 
@@ -366,6 +363,15 @@ def UpdateDepsFile(deps_filename, old_cr_revision, new_cr_revision,
 
   # Update each individual DEPS entry.
   for dep in changed_deps:
+    local_dep_dir = os.path.join(CHECKOUT_ROOT_DIR, dep.path)
+    if not os.path.isdir(local_dep_dir):
+      raise RollError(
+          'Cannot find local directory %s. Either run\n'
+          'gclient sync --deps=all\n'
+          'or make sure the .gclient file for your solution contains all '
+          'platforms in the target_os list, i.e.\n'
+          'target_os = ["android", "unix", "mac", "ios", "win"];\n'
+          'Then run "gclient sync" again.' % local_dep_dir)
     _, stderr = _RunCommand(
       ['roll-dep-svn', '--no-verify-revision', dep.path, dep.new_rev],
       working_dir=CHECKOUT_SRC_DIR, ignore_exit_code=True)