[NaCl SDK] Disable native (non-NaCl) PPAPI tests

native_client_sdk/src/build_tools/test_sdk.py

Index: native_client_sdk/src/build_tools/test_sdk.py
diff --git a/native_client_sdk/src/build_tools/test_sdk.py b/native_client_sdk/src/build_tools/test_sdk.py
index dbc8285b3c0bec9c9ec79321f88586e3a276fee5..a2994fa8b6fd9bc5b9191448b71edc98960559f7 100755
--- a/native_client_sdk/src/build_tools/test_sdk.py
+++ b/native_client_sdk/src/build_tools/test_sdk.py
@@ -152,6 +152,10 @@ def StepRunBrowserTests(toolchains, experimental):
   if experimental:
     args.append('-x')
   for toolchain in toolchains:
+    # TODO(sbc): Re-enable brower tests for native PPAPI platforms:
+    # http://crbug.com/646666
+    if toolchain in ['mac', 'linux', 'win']:
+      continue
     args.extend(['-t', toolchain])
 
   try: