Implements onBoundsChanged event in virtualKeyboardPrivate namespace

extensions/common/api/virtual_keyboard_private.json

 // Copyright 2013 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": "virtualKeyboardPrivate",
     "compiler_options": {
       "implemented_in": "extensions/browser/api/virtual_keyboard_private/virtual_keyboard_private_api.h"
     },
@@ skipping 21 matching lines @@
         "id": "KeyboardMode",
         "type": "string",
         "enum": [ "FULL_WIDTH", "FLOATING" ],
         "description": "The value of the virtual keyboard mode to set to."
       },
       {
         "id": "OnTextInputBoxFocusedType",
         "type": "string",
         "description": "The value of type attribute of the focused text input box.",
         "enum": ["text", "number", "password", "date", "url", "tel", "email"]
-       }
+      },
+      {
+        "id": "Bounds",
+        "type": "object",
+        "properties": {
+          "left": {"type": "integer", "description": "The position of the virtual keyboard window's left edge."},
+          "top": {"type": "integer", "description": "The position of the virtual keyboard window's top edge."},
+          "width": {"type": "integer", "description": "The width of the virtual keyboard window."},
+          "height": {"type": "integer", "description": "The height of the virtual keyboard window."}
+        }
+      }
     ],
     "functions": [
       {
         "name": "insertText",
         "type": "function",
         "description": "Inserts text into the currently focused text field.",
         "parameters": [
           { "name": "text",
             "type": "string",
             "description": "The text that will be inserted."
@@ skipping 148 matching lines @@
             "name": "context",
             "description": "Describes the text input box that has acquired focus. Note only the type of text input box is passed. This API is intended to be used by non-ime virtual keyboard only. Normal ime virtual keyboard should use chrome.input.ime.onFocus to get the more detailed InputContext.",
             "properties": {
               "type": {
                 "$ref": "OnTextInputBoxFocusedType",
                 "description": "The value of type attribute of the focused text input box."
               }
             }
           }
         ]
+      },
+      {
+        "name": "onBoundsChanged",
+        "type": "function",
+        "description": "This event is sent when virtual keyboard bounds changed and overscroll/resize is enabled.",
+        "parameters": [
+          {
+            "name": "bounds",
+            "description": "The virtual keyboard bounds",
+            "$ref": "Bounds"
+          }
+        ]
       }
     ]
   }
 ]