chromium_tests: fix crash in deapply_patch on got_webkit_revision

scripts/slave/recipes/webrtc/chromium.expected/chromium_webrtc_Mac_Tester.json

Index: scripts/slave/recipes/webrtc/chromium.expected/chromium_webrtc_Mac_Tester.json
diff --git a/scripts/slave/recipes/webrtc/chromium.expected/chromium_webrtc_Mac_Tester.json b/scripts/slave/recipes/webrtc/chromium.expected/chromium_webrtc_Mac_Tester.json
index 173cff47f4cb1c3df135cf8ac97fef4c923f1b8e..fbf8a6dd30498af8127f068553a1edda6255d2aa 100644
--- a/scripts/slave/recipes/webrtc/chromium.expected/chromium_webrtc_Mac_Tester.json
+++ b/scripts/slave/recipes/webrtc/chromium.expected/chromium_webrtc_Mac_Tester.json
@@ -15,7 +15,7 @@
       "--root",
       "src",
       "--revision_mapping_file",
-      "{\"src\": \"got_revision\", \"src/native_client\": \"got_nacl_revision\", \"src/third_party/WebKit\": \"got_webkit_revision\", \"src/third_party/libjingle/source/talk\": \"got_libjingle_revision\", \"src/third_party/libvpx/source\": \"got_libvpx_revision\", \"src/third_party/webrtc\": \"got_webrtc_revision\", \"src/tools/swarming_client\": \"got_swarming_client_revision\", \"src/v8\": \"got_v8_revision\"}",
+      "{\"src\": \"got_revision\", \"src/native_client\": \"got_nacl_revision\", \"src/third_party/libjingle/source/talk\": \"got_libjingle_revision\", \"src/third_party/libvpx/source\": \"got_libvpx_revision\", \"src/third_party/webrtc\": \"got_webrtc_revision\", \"src/tools/swarming_client\": \"got_swarming_client_revision\", \"src/v8\": \"got_v8_revision\"}",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
@@ -42,8 +42,6 @@
       "@@@STEP_LOG_LINE@json.output@    \"got_swarming_client_revision_cp\": \"refs/heads/master@{#276089}\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"got_v8_revision\": \"801ada225ddc271c132c3a35f03975671d43e399\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"got_v8_revision_cp\": \"refs/heads/master@{#43426}\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"got_webkit_revision\": \"5e2293dffc3cd07d37fbedea3b500f0eb650614d\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"got_webkit_revision_cp\": \"refs/heads/master@{#124383}\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"got_webrtc_revision\": \"0f90628433546e61d9268596da93418c623137f4\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"got_webrtc_revision_cp\": \"refs/heads/master@{#120644}\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
@@ -52,11 +50,10 @@
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@",
       "@@@SET_BUILD_PROPERTY@got_nacl_revision@\"d998e125e8253980d76e269b7982aeeefc1b9b50\"@@@",
-      "@@@SET_BUILD_PROPERTY@got_webkit_revision@\"5e2293dffc3cd07d37fbedea3b500f0eb650614d\"@@@",
-      "@@@SET_BUILD_PROPERTY@got_libvpx_revision@\"9240a98dab275a8a92a3631502866a58dceb2a49\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_swarming_client_revision@\"a0ee5d99f1d4b38ddaa4c759c837980b63b99566\"@@@",
       "@@@SET_BUILD_PROPERTY@got_webrtc_revision@\"0f90628433546e61d9268596da93418c623137f4\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision@\"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\"@@@",
-      "@@@SET_BUILD_PROPERTY@got_swarming_client_revision@\"a0ee5d99f1d4b38ddaa4c759c837980b63b99566\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_libvpx_revision@\"9240a98dab275a8a92a3631502866a58dceb2a49\"@@@",
       "@@@SET_BUILD_PROPERTY@got_libjingle_revision@\"8e938c8836c7ed23d7fbcddf1dcc2abcb13667d7\"@@@",
       "@@@SET_BUILD_PROPERTY@got_nacl_revision_cp@\"refs/heads/master@{#274981}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_v8_revision@\"801ada225ddc271c132c3a35f03975671d43e399\"@@@",
@@ -65,7 +62,6 @@
       "@@@SET_BUILD_PROPERTY@got_webrtc_revision_cp@\"refs/heads/master@{#120644}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_libvpx_revision_cp@\"refs/heads/master@{#11245}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#170242}\"@@@",
-      "@@@SET_BUILD_PROPERTY@got_webkit_revision_cp@\"refs/heads/master@{#124383}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_libjingle_revision_cp@\"refs/heads/master@{#134440}\"@@@"
     ]
   },