Fix the Kasko GN build.

chrome/test/kasko/hang_watcher_integration_test.py

Index: chrome/test/kasko/hang_watcher_integration_test.py
diff --git a/chrome/test/kasko/hang_watcher_integration_test.py b/chrome/test/kasko/hang_watcher_integration_test.py
index 345a2408bcb909d4e2f48f70a5c1719eaabe4efb..b6064fe4b6d68d900a4d377c13acfbdcb2a0749e 100755
--- a/chrome/test/kasko/hang_watcher_integration_test.py
+++ b/chrome/test/kasko/hang_watcher_integration_test.py
@@ -14,13 +14,20 @@ of Chrome with Chrome branding, and attempting to use it with anything else will
 most likely lead to constant failures.
 
 Typical usage (assuming in root 'src' directory):
-
-- generate project files with the following GYP variables:
-    branding=Chrome kasko=1 kasko_hang_reports=1
+- generate project files with the following build variables:
+    GYP variables:
+      branding=Chrome kasko=1 kasko_hang_reports=1
+    GN variables:
+      target_cpu = "x86"
+      is_debug = false
+      is_chrome_branded = true
+      enable_kasko = true
+      enable_kasko_hang_reports = true
 - build the release Chrome binaries:
-    ninja -C out\Release chrome.exe chromedriver.exe
+    ninja -C {build_dir} chrome.exe chromedriver.exe
 - run the test:
     python chrome/test/kasko/hang_watcher_integration_test.py
+      --chrome={build_dir}\chrome.exe
 """
 
 import logging