Browser 尝试获取Chromium源代码时出错（来自deps_os的值…）

我正在尝试获取Chromium 34的源代码，因此我遵循了Chromium.org上的说明：
在最后一个命令中，

gclient sync--with_branch_heads--jobs 16

，我收到一个错误，上面写着“error:1>来自deps_os（…）的值。”

完全错误：

gclient(569) MergeWithOsDeps:Ignoring 'src/pdf':None in 'android' deps_os
gclient(569) MergeWithOsDeps:Ignoring 'src/chrome/test/data/perf/canvas_bench':None in 'ios' deps_os
gclient(569) MergeWithOsDeps:Ignoring 'src/chrome/test/data/perf/frame_rate/content':None in 'ios' deps_os
gclient(569) MergeWithOsDeps:Ignoring 'src/native_client':None in 'ios' deps_os
gclient(569) MergeWithOsDeps:Ignoring 'src/third_party/ffmpeg':None in 'ios' deps_os
gclient(569) MergeWithOsDeps:Ignoring 'src/third_party/hunspell':None in 'ios' deps_os
gclient(569) MergeWithOsDeps:Ignoring 'src/third_party/hunspell_dictionaries':None in 'ios' deps_os
gclient(569) MergeWithOsDeps:Ignoring 'src/third_party/webgl':None in 'ios' deps_os
Syncing projects: 100% ( 1/ 1) src

src (ERROR)
----------------------------------------
[0:00:00] Started.
[0:00:00] ________ unmanaged solution; skipping src
----------------------------------------
Error: 1> Value from deps_os ('ios'; 'src/tools/gyp': {'url': 'https://chromium.googlesource.com/external/gyp.git@fe00999dfaee449d3465a9316778434884da4fa7', 'should_process': False}) conflicts with existing deps entry ({'url': 'https://chromium.googlesource.com/external/gyp.git@82b08049cc0b1f9e0bdcc0702ac6b523360f635f'}).