Wallpaper manager backend APIs

chrome/common/extensions/api/experimental_wallpaper_manager.json

+// Copyright (c) 2012 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.
+
+[
+  {
+    "namespace":"experimental.wallpaperManager",
+    "nodoc": "true",
+    "functions": [
+      {
+        "name": "getStrings",
+        "type": "function",
+        "description": "Gets translated strings.",
+        "nodoc": "true",
+        "parameters": [
+          {
+            "type": "function",
+            "name": "callback",
+            "parameters": [
+              {
+                "name": "result",
+                "type": "object",
+                "additionalProperties": {"type": "string"}
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "name": "setWallpaper",
+        "type": "function",
+        "description": "Sets wallpaper to the image from url with specified layout",
+        "nodoc": "true",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "url"
+          },
+          {
+            "type": "string",
+            "name": "layout"

[flackr, 2012/07/12 19:26:12]

Add "enum": ["list", "of", "acceptable", "values"] as in
chrome/common/extensions/api/experimental_font_settings.json

[bshe, 2012/07/13 19:28:57]

Done.

+          }
+        ]
+      }
+    ],
+    "events": [
+      {
+        "name": "onDownloadProgress",
+        "type": "function",
+        "description": "Fired when wallpaper downloading is in progress.",
+        "parameters": [
+          {
+            "name": "event",
+            "type": "object",
+            "description": "A simple event."

[flackr, 2012/07/12 19:26:12]

This description is somewhat vague, see experimental_font_settings.json for
defining properties which exist on objects and I imagine there are specific
interesting properties for these event objects.

+          }
+        ]
+      },
+      {
+        "name": "onDownloadDone",
+        "type": "function",
+        "description": "Fired when wallpaper downloading is finished.",
+        "parameters": []
+      },
+      {
+        "name": "onDownloadError",
+        "type": "function",
+        "description": "Fired when wallpaper downloading has an error.",
+        "parameters": [
+          {
+            "name": "event",
+            "type": "object",
+            "description": "A simple event."
+          }
+        ]
+      }
+    ]
+  }
+]