Adjust autolookup for EMTEST_BROWSER to avoid PATH

Author: juj

test/browser_common.py

@@ -332,11 +332,11 @@ def configure_test_browser():
   if not has_browser():
     return
 
-  if not EMTEST_BROWSER:
-    EMTEST_BROWSER = shutil.which('google-chrome')
-    if not EMTEST_BROWSER:
-      EMTEST_BROWSER = shutil.which('firefox')
-    if not EMTEST_BROWSER:
+  EMTEST_BROWSER = 'google-chrome'
+  if not shutil.which(EMTEST_BROWSER):
+    EMTEST_BROWSER = 'firefox'
+    if not shutil.which(EMTEST_BROWSER):
+      # FIXME: This should really be and error, but this code currently also runs for non-browser tests.
       EMTEST_BROWSER = 'default-browser-not-found'
 
   if WINDOWS and '"' not in EMTEST_BROWSER and "'" not in EMTEST_BROWSER: