diff --git a/tools_webrtc/autoroller/roll_deps.py b/tools_webrtc/autoroller/roll_deps.py
index 4ec9a7a021..1c248ec71e 100755
--- a/tools_webrtc/autoroller/roll_deps.py
+++ b/tools_webrtc/autoroller/roll_deps.py
@@ -21,14 +21,6 @@ import sys
 import urllib.request
 
 
-def FindSrcDirPath():
-    """Returns the abs path to the src/ dir of the project."""
-    src_dir = os.path.dirname(os.path.abspath(__file__))
-    while os.path.basename(src_dir) != 'src':
-        src_dir = os.path.normpath(os.path.join(src_dir, os.pardir))
-    return src_dir
-
-
 # Skip these dependencies (list without solution name prefix).
 DONT_AUTOROLL_THESE = [
     'src/examples/androidtests/third_party/gradle',
@@ -66,7 +58,8 @@ CLANG_REVISION_RE = re.compile(r'^CLANG_REVISION = \'([-0-9a-z]+)\'$')
 ROLL_BRANCH_NAME = 'roll_chromium_revision'
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
-CHECKOUT_SRC_DIR = FindSrcDirPath()
+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))
 
 # Copied from tools/android/roll/android_deps/.../BuildConfigGenerator.groovy.
diff --git a/tools_webrtc/presubmit_checks_lib/build_helpers.py b/tools_webrtc/presubmit_checks_lib/build_helpers.py
index 849fc771ae..9f08d26aae 100644
--- a/tools_webrtc/presubmit_checks_lib/build_helpers.py
+++ b/tools_webrtc/presubmit_checks_lib/build_helpers.py
@@ -19,15 +19,8 @@ import sys
 import tempfile
 
 
-def find_src_dir_path():
-    """Returns the abs path to the src/ dir of the project."""
-    src_dir = os.path.dirname(os.path.abspath(__file__))
-    while os.path.basename(src_dir) != 'src':
-        src_dir = os.path.normpath(os.path.join(src_dir, os.pardir))
-    return src_dir
-
-
-SRC_DIR = find_src_dir_path()
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+SRC_DIR = os.path.realpath(os.path.join(SCRIPT_DIR, os.pardir, os.pardir))
 sys.path.append(os.path.join(SRC_DIR, 'build'))
 import find_depot_tools
 
diff --git a/tools_webrtc/version_updater/update_version.py b/tools_webrtc/version_updater/update_version.py
index bc1bc9d364..786da2103f 100644
--- a/tools_webrtc/version_updater/update_version.py
+++ b/tools_webrtc/version_updater/update_version.py
@@ -19,16 +19,10 @@ import subprocess
 import sys
 
 
-def find_src_dir_path():
-    """Returns the abs path to the src/ dir of the project."""
-    src_dir = os.path.dirname(os.path.abspath(__file__))
-    while os.path.basename(src_dir) != 'src':
-        src_dir = os.path.normpath(os.path.join(src_dir, os.pardir))
-    return src_dir
-
-
 UPDATE_BRANCH_NAME = 'webrtc_version_update'
-CHECKOUT_SRC_DIR = find_src_dir_path()
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+CHECKOUT_SRC_DIR = os.path.realpath(
+  os.path.join(SCRIPT_DIR, os.pardir, os.pardir))
 
 NOTIFY_EMAIL = 'webrtc-trooper@webrtc.org'