Roll recipe dependencies (nontrivial).

scripts/slave/recipes/chromium.gpu.recipe_autogen.expected/Android_Debug__Nexus_9_.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "chromium.gpu.fyi",
       "--builder",
       "Android Debug (Nexus 9)",
       "--slave",
       "TestSlave",
       "--spec",
       "cache_dir = '[GIT_CACHE]'\nsolutions = [{'custom_deps': {'src/third_party/WebKit/LayoutTests': None}, 'custom_vars': {'googlecode_url': 'http://%s.googlecode.com/svn', 'llvm_url': 'http://llvm.org/svn/llvm-project', 'nacl_trunk': 'http://src.chromium.org/native_client/trunk', 'sourceforge_url': 'https://svn.code.sf.net/p/%(repo)s/code', 'webkit_trunk': 'http://src.chromium.org/blink/trunk'}, 'deps_file': '.DEPS.git', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}]\ntarget_os = ['android']",
       "--root",
       "src",
       "--revision_mapping_file",
       "{\"src\": \"got_revision\", \"src/third_party/WebKit\": \"got_webkit_revision\", \"src/tools/swarming_client\": \"got_swarming_client_revision\", \"src/v8\": \"got_v8_revision\"}",
       "--git-cache-dir",
       "[GIT_CACHE]",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "src@HEAD",
       "--force",
       "--output_manifest"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"src\": \"HEAD\"@@@",
@@ skipping 43 matching lines @@
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/gclient_safe_revert.py",
       ".",
       "[DEPOT_TOOLS]/gclient"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "gclient revert"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/tools/runit.py",
       "--show-path",
       "python",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/cleanup_temp.py"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
     "allow_subannotations": true,
     "cmd": [
       "python",
       "-u",
       "src/build/android/buildbot/bb_run_bot.py",
       "--build-properties={\"buildername\":\"Android Debug (Nexus 9)\",\"mastername\":\"chromium.gpu.fyi\",\"recipe\":\"chromium.gpu.recipe_autogen\",\"slavename\":\"TestSlave\"}",
       "--factory-properties={\"GYP_DEFINES\":\" component=shared_library\",\"android_bot_id\":\"gpu-builder-tests-dbg\",\"clobber\":false,\"gclient_env\":{},\"gclient_timeout\":3600,\"target\":\"Debug\",\"target_os\":\"android\"}"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "slave_steps"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]