Forward BrowserAccessibility accSelect() to AXPlatformNode.

ui/accessibility/platform/ax_platform_node_win.cc

Index: ui/accessibility/platform/ax_platform_node_win.cc
diff --git a/ui/accessibility/platform/ax_platform_node_win.cc b/ui/accessibility/platform/ax_platform_node_win.cc
index 6dcdc91e23134602f6be614e7d9fd9f4f6b9761c..854450eef73a3a6a5b9297b4595c6bd5f9a41195 100644
--- a/ui/accessibility/platform/ax_platform_node_win.cc
+++ b/ui/accessibility/platform/ax_platform_node_win.cc
@@ -538,8 +538,6 @@ STDMETHODIMP AXPlatformNodeWin::put_accValue(VARIANT var_id,
   return E_FAIL;
 }
 
-// IAccessible functions not supported.
-
 STDMETHODIMP AXPlatformNodeWin::get_accSelection(VARIANT* selected) {
   COM_OBJECT_VALIDATE_1_ARG(selected);
   if (selected)
@@ -549,7 +547,18 @@ STDMETHODIMP AXPlatformNodeWin::get_accSelection(VARIANT* selected) {
 
 STDMETHODIMP AXPlatformNodeWin::accSelect(
     LONG flagsSelect, VARIANT var_id) {
-  return E_NOTIMPL;
+  AXPlatformNodeWin* target;
+  COM_OBJECT_VALIDATE_VAR_ID_AND_GET_TARGET(var_id, target);
+
+  if (flagsSelect & SELFLAG_TAKEFOCUS) {
+    ui::AXActionData action_data;
+    action_data.action = ui::AX_ACTION_FOCUS;
+    action_data.target_node_id = unique_id_;

[dmazzoni, 2017/05/30 15:24:04]

Wrong id - this should be GetData().id() - but actually it's not needed
either way since we're calling it on a specific object, so
BrowserAccessibilityManager sets the id before forwarding the
action to the renderer

...so delete it for now, but in general be careful about node id
vs unique id

The unique id is only for the browser process, the node id is
unique within a frame and used for communicating actions to
the render process

+    target->delegate_->AccessibilityPerformAction(action_data);
+    return S_OK;
+  }
+
+  return S_FALSE;
 }
 
 STDMETHODIMP AXPlatformNodeWin::get_accHelpTopic(