Implement actions for Automation API.

chrome/renderer/resources/extensions/automation/automation_tree.js

Index: chrome/renderer/resources/extensions/automation/automation_tree.js
diff --git a/chrome/renderer/resources/extensions/automation/automation_tree.js b/chrome/renderer/resources/extensions/automation/automation_tree.js
index d644ae580f7d4e103451b6ecb1175cbd89a5742d..d5d991ed6e82c1ccca97741248ddfed60c8d036a 100644
--- a/chrome/renderer/resources/extensions/automation/automation_tree.js
+++ b/chrome/renderer/resources/extensions/automation/automation_tree.js
@@ -37,10 +37,12 @@ var AutomationAttributeTypes = [
  * AutomationNode object.
  * Thus, tree traversals amount to a lookup in our hash.
  *
+ * The tree itself is identified by the process id and routing id of the
+ * renderer/renderer host pair.
  * @constructor
  */
-var AutomationTree = function(routingId) {
-  privates(this).impl = new AutomationTreeImpl(routingId);
+var AutomationTree = function(processId, routingId) {
+  privates(this).impl = new AutomationTreeImpl(processId, routingId);
 
   /**
    * Event fired when a tree update occurs.
@@ -63,7 +65,8 @@ AutomationTree.prototype = {
 };
 
 
-var AutomationTreeImpl = function(routingId) {
+var AutomationTreeImpl = function(processId, routingId) {
+  this.processId = processId;
   this.routingId = routingId;
 
   /**