app_shell: Introduce skeleton for identity API

This is mostly for testing. It takes a refresh token on the
command line and uses it to provide access tokens via the
chrome.identity.getAuthToken() API.

BUG=424653
TEST=app_shell_unittests ShellOAuth2TokenServiceTest and IdentityApiTest

Review URL: https://codereview.chromium.org/670473003

Cr-Commit-Position: refs/heads/master@{#301738}

7 files changed, 38 insertions, 20 deletions

diff --git a/extensions/shell/common/api/_api_features.json b/extensions/shell/common/api/_api_features.json
index b4a1376..779e197 100644
--- a/extensions/shell/common/api/_api_features.json
+++ b/extensions/shell/common/api/_api_features.json
@@ -7,7 +7,8 @@
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
 {
-  "shell.identity": {
+  // Stub implementation of chrome.identity for app_shell.
+  "identity": {
     "channel": "dev",
     "contexts": ["blessed_extension"],
     "extension_types": ["platform_app"]
diff --git a/extensions/shell/common/api/identity.idl b/extensions/shell/common/api/identity.idl
new file mode 100644
index 0000000..a77509a
--- /dev/null
+++ b/extensions/shell/common/api/identity.idl
@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// Simplified implementation of the <code>chrome.identity</code> for app_shell.
+namespace identity {
+
+  dictionary GetAuthTokenDetails {
+    // Ignored parameter. Exists only for compatibility.
+    boolean? interactive;
+  };
+
+  // Called with the OAuth2 access token on success or undefined on error.
+  callback GetAuthTokenCallback = void (optional DOMString token);
+
+  interface Functions {
+    // Returns an OAuth2 access token for the current app_shell user for scopes
+    // from the manifest. Does not prompt the user. 
+    static void getAuthToken(GetAuthTokenDetails options,
+                             GetAuthTokenCallback callback);
+  };
+
+};
diff --git a/extensions/shell/common/api/schemas.gypi b/extensions/shell/common/api/schemas.gypi
index 13def4f..0af258d 100644
--- a/extensions/shell/common/api/schemas.gypi
+++ b/extensions/shell/common/api/schemas.gypi
@@ -11,10 +11,10 @@
     'non_compiled_schema_files': [
     ],
     'schema_files': [
-      'shell_identity.idl',
+      'identity.idl',
     ],
     'cc_dir': 'extensions/shell/common/api',
-    'root_namespace': 'extensions::shell_api::%(namespace)s',
+    'root_namespace': 'extensions::shell::api::%(namespace)s',
     'impl_dir_': 'extensions/shell/browser/api',
   },
 }
diff --git a/extensions/shell/common/api/shell_identity.idl b/extensions/shell/common/api/shell_identity.idl
deleted file mode 100644
index 6772bae..0000000
--- a/extensions/shell/common/api/shell_identity.idl
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2014 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.
-
-// Use the <code>chrome.shell.identity</code> API to retrieve OAuth2 tokens
-// for user accounts.  See also <code>chrome.identity</code>.
-namespace shell.identity {
-
-  interface Functions {
-    // TODO(jamescook): Implement this with options and a callback.
-    static void getAuthToken();
-  };
-
-};
diff --git a/extensions/shell/common/shell_extensions_client.cc b/extensions/shell/common/shell_extensions_client.cc
index 4fc57e8..9df2b12 100644
--- a/extensions/shell/common/shell_extensions_client.cc
+++ b/extensions/shell/common/shell_extensions_client.cc
@@ -174,14 +174,14 @@ bool ShellExtensionsClient::IsScriptableURL(const GURL& url,
 bool ShellExtensionsClient::IsAPISchemaGenerated(
     const std::string& name) const {
   return core_api::GeneratedSchemas::IsGenerated(name) ||
-         shell_api::GeneratedSchemas::IsGenerated(name);
+         shell::api::GeneratedSchemas::IsGenerated(name);
 }
 
 base::StringPiece ShellExtensionsClient::GetAPISchema(
     const std::string& name) const {
   // Schema for app_shell-only APIs.
-  if (shell_api::GeneratedSchemas::IsGenerated(name))
-    return shell_api::GeneratedSchemas::Get(name);
+  if (shell::api::GeneratedSchemas::IsGenerated(name))
+    return shell::api::GeneratedSchemas::Get(name);
 
   // Core extensions APIs.
   return core_api::GeneratedSchemas::Get(name);
diff --git a/extensions/shell/common/switches.cc b/extensions/shell/common/switches.cc
index 0186422..4b0ccc0 100644
--- a/extensions/shell/common/switches.cc
+++ b/extensions/shell/common/switches.cc
@@ -16,5 +16,11 @@ const char kAppShellHostWindowBounds[] = "app-shell-host-window-bounds";
 // SSID of the preferred WiFi network.
 const char kAppShellPreferredNetwork[] = "app-shell-preferred-network";
 
+// Refresh token for identity API calls for the current user. Used for testing.
+const char kAppShellRefreshToken[] = "app-shell-refresh-token";
+
+// User email address of the current user.
+const char kAppShellUser[] = "app-shell-user";
+
 }  // namespace switches
 }  // namespace extensions
diff --git a/extensions/shell/common/switches.h b/extensions/shell/common/switches.h
index 6c4911d..30196ae 100644
--- a/extensions/shell/common/switches.h
+++ b/extensions/shell/common/switches.h
@@ -13,6 +13,8 @@ namespace switches {
 extern const char kAppShellAppPath[];
 extern const char kAppShellHostWindowBounds[];
 extern const char kAppShellPreferredNetwork[];
+extern const char kAppShellRefreshToken[];
+extern const char kAppShellUser[];
 
 }  // namespace switches
 }  // namespace extensions