tools/android/loading Split GoogleAPI wrappers to a separate library

tools/android/loading/gce/google_storage_accessor.py

Index: tools/android/loading/gce/google_storage_accessor.py
diff --git a/tools/android/loading/gce/google_storage_accessor.py b/tools/android/loading/gce/google_storage_accessor.py
new file mode 100644
index 0000000000000000000000000000000000000000..59c47da3ec04976fa2d1ee6dc428ce11727144df
--- /dev/null
+++ b/tools/android/loading/gce/google_storage_accessor.py
@@ -0,0 +1,60 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from gcloud import storage
+from oauth2client.client import GoogleCredentials
+
+
+class GoogleStorageAccessor(object):
+  """Utility class providing helpers for Google Cloud Storage.
+  """
+  def __init__(self, project_name, bucket_name):
+    """project_name is the name of the Google Cloud project.
+    bucket_name is the name of the bucket that is used for Cloud Storage calls.
+    """
+    self._credentials = GoogleCredentials.get_application_default()
+    self._project_name = project_name
+    self._bucket_name = bucket_name
+
+  def _GetStorageClient(self):
+    """Returns the storage client associated with the project"""
+    return storage.Client(project = self._project_name,
+                          credentials = self._credentials)
+
+  def _GetStorageBucket(self, storage_client):
+    return storage_client.get_bucket(self._bucket_name)
+
+  def UploadFile(self, filename_src, filename_dest):
+    """Uploads a file to Google Cloud Storage
+
+    Args:
+      filename_src: name of the local file
+      filename_dest: name of the file in Google Cloud Storage
+
+    Returns:
+      The URL of the file in Google Cloud Storage.
+    """
+    client = self._GetStorageClient()
+    bucket = self._GetStorageBucket(client)
+    blob = bucket.blob(filename_dest)
+    with open(filename_src) as file_src:
+      blob.upload_from_file(file_src)
+    return blob.public_url
+
+  def UploadString(self, data_string, filename_dest):
+    """Uploads a string to Google Cloud Storage
+
+    Args:
+      data_string: the contents of the file to be uploaded
+      filename_dest: name of the file in Google Cloud Storage
+
+    Returns:
+      The URL of the file in Google Cloud Storage.
+    """
+    client = self._GetStorageClient()
+    bucket = self._GetStorageBucket(client)
+    blob = bucket.blob(filename_dest)
+    blob.upload_from_string(data_string)
+    return blob.public_url
+