Add a new webstorePrivate API to show a permission prompt for delegated installs

chrome/common/extensions/api/webstore_private.json

Index: chrome/common/extensions/api/webstore_private.json
diff --git a/chrome/common/extensions/api/webstore_private.json b/chrome/common/extensions/api/webstore_private.json
index 2ac2c7b35be620e551ccc9259458c848cb892d16..83795a2fa24cd81de24f86cc8cdfc106198054cd 100644
--- a/chrome/common/extensions/api/webstore_private.json
+++ b/chrome/common/extensions/api/webstore_private.json
@@ -116,6 +116,61 @@
         ]
       },
       {
+        "name": "showPermissionPromptForDelegatedInstall",
+        "description": "Shows a permission prompt for the given extension, for installing to a different account.",
+        "parameters": [
+          {
+            "name": "details",
+            "type": "object",
+            "properties": {
+              "id": {
+                "type": "string",
+                "description": "The id of the extension to be installled.",
+                "minLength": 32,
+                "maxLength": 32
+              },
+              "manifest": {
+                "type": "string",
+                "description": "A string with the contents of the extension's manifest.json file. During the install process, the browser will check that the downloaded extension's manifest matches what was passed in here.",
+                "minLength": 1
+              },
+              "delegatedUser": {
+                "type": "string",
+                "description": "The display name of the user for whom the extension should be installed."
+              },
+              "iconUrl": {
+                "type": "string",
+                "optional": true,
+                "desciption": "A URL for the image to display in the confirmation dialog"
+              },
+              "iconData": {
+                "type": "string",
+                "optional": true,
+                "description": "An icon as a base64-encoded image, displayed in a confirmation dialog."
+              },
+              "localizedName": {
+                "type": "string",
+                "optional": true,
+                "description": "A string to use instead of the raw value of the 'name' key from manifest.json."
+              }
+            }
+          },
+          {
+            "name": "callback",
+            "type": "function",
+            "description": "Called when the user has either accepted/rejected the dialog, or some error occurred (such as invalid manifest or icon image data).",
+            "optional": true,
+            "parameters": [
+              {
+                "name": "result",
+                "type": "string",
+                "description": "A string result code, which will be empty upon success. The possible values in the case of errors include 'unknown_error', 'user_cancelled', 'manifest_error', 'icon_error', 'invalid_id', and 'invalid_icon_url'."
+              }
+            ]
+          }
+        ]
+      },
+      {
         "name": "enableAppLauncher",
         "description": "",
         "parameters": [