Build command buffer with is_component_build=false

BUG=skia:5630
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2265913002

Review-Url: https://codereview.chromium.org/2265913002
diff --git a/tools/build_command_buffer.py b/tools/build_command_buffer.py
index 7dabafe..08f76db 100755
--- a/tools/build_command_buffer.py
+++ b/tools/build_command_buffer.py
@@ -131,7 +131,8 @@
     gn = 'gn.exe'
   gn = os.path.join(chrome_src_dir, 'buildtools', platform, gn)
   try:
-    subprocess.check_call([gn, 'gen', chrome_target_dir_rel],
+    subprocess.check_call([gn, 'gen', chrome_target_dir_rel,
+                           '--args=is_component_build=false'],
                           cwd=chrome_src_dir)
   except subprocess.CalledProcessError as error:
     sys.exit('Error (ret code: %s) calling "%s" in %s' % (