Implement BrowserAccessibility accLocation in terms of AXPlatformNodeWin.

content/browser/accessibility/browser_accessibility_win.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/accessibility/browser_accessibility_win.h"
 
 #include <UIAutomationClient.h>
 #include <UIAutomationCoreApi.h>
 
 #include <algorithm>
@@ skipping 465 matching lines @@
 
 STDMETHODIMP BrowserAccessibilityWin::accLocation(LONG* x_left,
                                                   LONG* y_top,
                                                   LONG* width,
                                                   LONG* height,
                                                   VARIANT var_id) {
   WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_ACC_LOCATION);
   if (!instance_active())
     return E_FAIL;
 
-  if (!x_left || !y_top || !width || !height)
-    return E_INVALIDARG;
-
-  BrowserAccessibilityWin* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  gfx::Rect bounds = target->GetScreenBoundsRect();
-  *x_left = bounds.x();
-  *y_top  = bounds.y();
-  *width  = bounds.width();
-  *height = bounds.height();
-
-  return S_OK;
+  return GetPlatformNodeWin()->accLocation(x_left, y_top, width, height,
+                                           var_id);
 }
 
 STDMETHODIMP BrowserAccessibilityWin::accNavigate(LONG nav_dir,
                                                   VARIANT start,
                                                   VARIANT* end) {
   WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_ACC_NAVIGATE);
   BrowserAccessibilityWin* target = GetTargetFromChildID(start);
   if (!target)
     return E_INVALIDARG;
 
@@ skipping 4520 matching lines @@
 }
 
 void BrowserAccessibilityWin::FireNativeEvent(LONG win_event_type) const {
   (new BrowserAccessibilityEventWin(
       BrowserAccessibilityEvent::FromTreeChange,
       ui::AX_EVENT_NONE,
       win_event_type,
       this))->Fire();
 }
 
+ui::AXPlatformNodeWin* BrowserAccessibilityWin::GetPlatformNodeWin() const {
+  DCHECK(platform_node_);
+  return static_cast<ui::AXPlatformNodeWin*>(platform_node_);
+}
+
 void BrowserAccessibilityWin::InitRoleAndState() {
   int32_t ia_role = 0;
   int32_t ia_state = 0;
   base::string16 role_name;
   int32_t ia2_role = 0;
   int32_t ia2_state = IA2_STATE_OPAQUE;
 
   if (HasState(ui::AX_STATE_BUSY))
     ia_state |= STATE_SYSTEM_BUSY;
   if (HasState(ui::AX_STATE_CHECKED))
@@ skipping 573 matching lines @@
   return static_cast<BrowserAccessibilityWin*>(obj);
 }
 
 const BrowserAccessibilityWin*
 ToBrowserAccessibilityWin(const BrowserAccessibility* obj) {
   DCHECK(!obj || obj->IsNative());
   return static_cast<const BrowserAccessibilityWin*>(obj);
 }
 
 }  // namespace content