Forward BrowserAccessibility accSelect() to AXPlatformNode.

This forwards accSelect to the AXPlatformNode. In order to do this, we
had to extension AccessibilityPerformAction a bit to be able to handle
AX_ACTION_FOCUS. Not that the node id is not passed as part of the AXActionData
and is not being used by the delegate at this point.

BUG=703369

Review-Url: https://codereview.chromium.org/2913553003
Cr-Commit-Position: refs/heads/master@{#475806}

content/browser/accessibility/browser_accessibility.cc

@@ -1218,6 +1218,11 @@ bool BrowserAccessibility::AccessibilityPerformAction(
     return true;
   }
 
+  if (data.action == ui::AX_ACTION_FOCUS) {
+    manager_->SetFocus(*this);
+    return true;
+  }
+
   return false;
 }
 

content/browser/accessibility/browser_accessibility_com_win.cc

@@ -780,16 +780,7 @@ STDMETHODIMP BrowserAccessibilityComWin::accSelect(LONG flags_sel,
   if (!owner())
     return E_FAIL;
 
-  auto* manager = Manager();
-  if (!manager)
-    return E_FAIL;
-
-  if (flags_sel & SELFLAG_TAKEFOCUS) {
-    manager->SetFocus(*owner());
-    return S_OK;
-  }
-
-  return S_FALSE;
+  return AXPlatformNodeWin::accSelect(flags_sel, var_id);
 }
 
 STDMETHODIMP

ui/accessibility/platform/ax_platform_node_win.cc

@@ -550,8 +550,6 @@ 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)
@@ -561,7 +559,17 @@ 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;
+    target->delegate_->AccessibilityPerformAction(action_data);
+    return S_OK;
+  }
+
+  return S_FALSE;
 }
 
 STDMETHODIMP AXPlatformNodeWin::get_accHelpTopic(