DevTools: Switch dtrun test to use run_web_tests.py

Apparently run_layout_tests.py is being moved

Change-Id: I2ff85e0203d87d8dde8b0937830593fe1a1fb849
Reviewed-on: https://chromium-review.googlesource.com/1045177Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Joel Einbinder <einbinder@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556205}

third_party/blink/renderer/devtools/scripts/npm_test.js

@@ -30,7 +30,7 @@ var PYTHON = process.platform === 'win32' ? 'python.bat' : 'python';
 
 var CHROMIUM_SRC_PATH = CUSTOM_CHROMIUM_PATH || path.resolve(__dirname, '..', '..', '..', '..', '..');
 var RELEASE_PATH = path.resolve(CHROMIUM_SRC_PATH, 'out', TARGET);
-var BLINK_TEST_PATH = path.resolve(CHROMIUM_SRC_PATH, 'blink', 'tools', 'run_layout_tests.py');
+var BLINK_TEST_PATH = path.resolve(CHROMIUM_SRC_PATH, 'third_party', 'blink', 'tools', 'run_web_tests.py');
 var DEVTOOLS_PATH = path.resolve(CHROMIUM_SRC_PATH, 'third_party', 'blink', 'renderer', 'devtools');
 var CACHE_PATH = path.resolve(DEVTOOLS_PATH, '.test_cache');
 var SOURCE_PATH = path.resolve(DEVTOOLS_PATH, 'front_end');