Switch from text insertion to key press and release events on the virtual k…

chrome/common/extensions/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",
     "platforms": ["chromeos"],
     "description": "none",
+    "types": [
+      {
+        "id": "VirtualKeyboardEvent",
+        "type": "object",
+        "properties": {
+          "type": {"type": "string", "description": "One of keyup or keydown.", "enum": ["keyup", "keydown"]},
+          "charValue": {"type": "integer", "description": "Unicode value of the key."},
+          "keyCode": {"type": "integer", "description": "Virtual key code, which is independent of the keyboard layout or modifier state."},
+          "shiftKey": {"type": "boolean", "optional": true, "description": "Whether or not the SHIFT key is pressed."}
+        }
+      }
+    ],
     "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 18 matching lines @@
             "type": "integer",
             "description": "Bitmask representing the state of the system modifier keys."
           },
           { "type": "function",
             "name": "callback",
             "optional": true,
             "decription": "called when the swipe movement is completed.",
             "parameters": []
           }
         ]
+      },
+      {
+        "name": "sendKeyEvent",
+        "type": "function",
+        "description": "Sends a fabricated key event to the focused input field.",
+        "parameters": [
+          { "name": "keyEvent",
+            "$ref": "VirtualKeyboardEvent",
+            "description": ""
+          },
+          { "name": "callback",
+            "type": "function",
+            "optional": true,
+            "description": "Called after processing the event.",
+            "parameters": []
+          }
+        ]
       }
     ]
   }
 ]