webrtc: run tests in the checkout directory

scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_win_drmemory_full.json

Index: scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_win_drmemory_full.json
diff --git a/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_win_drmemory_full.json b/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_win_drmemory_full.json
index 4aba4a565eed4c38eeac07eeae3ff56a5335e3f8..9477c7769807d23f001b4c92acf56b30a8f43cb5 100644
--- a/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_win_drmemory_full.json
+++ b/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_win_drmemory_full.json
@@ -243,7 +243,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "audio_decoder_unittests"
   },
   {
@@ -274,7 +274,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "common_audio_unittests"
   },
   {
@@ -305,7 +305,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "common_video_unittests"
   },
   {
@@ -336,7 +336,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "modules_tests"
   },
   {
@@ -367,7 +367,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "modules_unittests"
   },
   {
@@ -398,7 +398,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "peerconnection_unittests"
   },
   {
@@ -429,7 +429,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "rtc_media_unittests"
   },
   {
@@ -460,7 +460,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "rtc_pc_unittests"
   },
   {
@@ -491,7 +491,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "rtc_unittests"
   },
   {
@@ -522,7 +522,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "system_wrappers_unittests"
   },
   {
@@ -553,7 +553,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "test_support_unittests"
   },
   {
@@ -584,7 +584,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "tools_unittests"
   },
   {
@@ -615,7 +615,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "video_engine_tests"
   },
   {
@@ -646,7 +646,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "voice_engine_unittests"
   },
   {
@@ -677,7 +677,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "xmllite_xmpp_unittests"
   },
   {
@@ -708,7 +708,7 @@
       "--tool",
       "drmemory_full"
     ],
-    "cwd": "[BUILDER_CACHE]\\win_drmemory_full",
+    "cwd": "[BUILDER_CACHE]\\win_drmemory_full\\src",
     "name": "webrtc_nonparallel_tests"
   },
   {