Add setSelection function to automation API.

chrome/common/extensions/api/automation_internal.idl

Index: chrome/common/extensions/api/automation_internal.idl
diff --git a/chrome/common/extensions/api/automation_internal.idl b/chrome/common/extensions/api/automation_internal.idl
index 6f568cfac6eba888dc5bb48d03b7ed63d08dbf64..28ca0d53857e39065ce632e13f6e62e5af91d1d4 100644
--- a/chrome/common/extensions/api/automation_internal.idl
+++ b/chrome/common/extensions/api/automation_internal.idl
@@ -36,10 +36,13 @@ namespace automationInternal {
     ActionType actionType;
   };
 
-  // Arguments for the set_selection action supplied to performAction.
+  // Arguments for the setSelection action supplied to performAction.
   dictionary SetSelectionParams {
-    long startIndex;
-    long endIndex;
+    // automationNodeID of performActionRequiredParams is used for the

[David Tseng, 2015/09/23 17:57:41]

nit: one space between sentences in this file.
Comment is somewhat confusing. Maybe
Reuses ActionRequiredParams automationNodeID to mean anchor node id, and treeID
to apply to both anchor and focus node id's.

+    // anchor node ID.  treeID applies to focusNodeID as well.
+    long focusNodeID;
+    long anchorOffset;
+    long focusOffset;
   };
 
   // Arguments for the querySelector function.