[WPR] Implement platform dependent recordings for WPR archives.

telemetry/telemetry/wpr/archive_info.py

Index: telemetry/telemetry/wpr/archive_info.py
diff --git a/telemetry/telemetry/wpr/archive_info.py b/telemetry/telemetry/wpr/archive_info.py
index 326da2d36b7411bcd7a7db5aa1212dc1f4991ab2..8ef370b19b259326219803fccb4ab64c5ef139e7 100644
--- a/telemetry/telemetry/wpr/archive_info.py
+++ b/telemetry/telemetry/wpr/archive_info.py
@@ -9,9 +9,12 @@ import re
 import shutil
 import tempfile
 
+from telemetry.wpr import archive_info2
+
 from py_utils import cloud_storage  # pylint: disable=import-error
 
 
+# TODO(rnephew): Remove this file when archive_info2 is the default.
 def AssertValidCloudStorageBucket(bucket):
   is_valid = bucket in (None,
                         cloud_storage.PUBLIC_BUCKET,
@@ -56,6 +59,8 @@ class WprArchiveInfo(object):
     if os.path.exists(file_path):
       with open(file_path, 'r') as f:
         data = json.load(f)
+        if data.get('platform_specific', False):
+          return archive_info2.WprArchiveInfo(file_path, data, bucket)
         return cls(file_path, data, bucket)
     return cls(file_path, {'archives': {}}, bucket)
 
@@ -97,7 +102,8 @@ class WprArchiveInfo(object):
                         "upload_to_cloud_storage")
           raise
 
-  def WprFilePathForStory(self, story):
+  def WprFilePathForStory(self, story, target_platform=None):
+    del target_platform
     if self.temp_target_wpr_file_path:
       return self.temp_target_wpr_file_path
     wpr_file = self._story_name_to_wpr_file.get(story.display_name, None)