[C++11 Allowed Features] Declares a type-safe null pointer converting from NULL to nullptr

content/browser/accessibility/browser_accessibility_win.cc

Index: content/browser/accessibility/browser_accessibility_win.cc
diff --git a/content/browser/accessibility/browser_accessibility_win.cc b/content/browser/accessibility/browser_accessibility_win.cc
index 355b188d632f874377ec820fbdf789716e1c15c4..b16c58eed2b334e904b58d741ef37566b6acecf8 100644
--- a/content/browser/accessibility/browser_accessibility_win.cc
+++ b/content/browser/accessibility/browser_accessibility_win.cc
@@ -305,7 +305,7 @@ STDMETHODIMP BrowserAccessibilityWin::accNavigate(LONG nav_dir,
 
   uint32 child_count = target->PlatformChildCount();
 
-  BrowserAccessibility* result = NULL;
+  BrowserAccessibility* result = nullptr;
   switch (nav_dir) {
     case NAVDIR_DOWN:
     case NAVDIR_UP:
@@ -347,7 +347,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_accChild(VARIANT var_child,
   if (!disp_child)
     return E_INVALIDARG;
 
-  *disp_child = NULL;
+  *disp_child = nullptr;
 
   BrowserAccessibilityWin* target = GetTargetFromChildID(var_child);
   if (!target)
@@ -413,7 +413,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_accFocus(VARIANT* focus_child) {
   if (focus == this) {
     focus_child->vt = VT_I4;
     focus_child->lVal = CHILDID_SELF;
-  } else if (focus == NULL) {
+  } else if (focus == nullptr) {
     focus_child->vt = VT_EMPTY;
   } else {
     focus_child->vt = VT_DISPATCH;
@@ -496,20 +496,20 @@ STDMETHODIMP BrowserAccessibilityWin::get_accParent(IDispatch** disp_parent) {
     return E_INVALIDARG;
 
   IAccessible* parent_obj = GetParent()->ToBrowserAccessibilityWin();
-  if (parent_obj == NULL) {
+  if (parent_obj == nullptr) {
     // This happens if we're the root of the tree;
     // return the IAccessible for the window.
     parent_obj =
         manager()->ToBrowserAccessibilityManagerWin()->GetParentIAccessible();
-    // |parent| can only be NULL if the manager was created before the parent
+    // |parent| can only be nullptr if the manager was created before the parent
     // IAccessible was known and it wasn't subsequently set before a client
-    // requested it. This has been fixed. |parent| may also be NULL during
+    // requested it. This has been fixed. |parent| may also be nullptr during
     // destruction. Possible cases where this could occur include tabs being
     // dragged to a new window, etc.
     if (!parent_obj) {
       DVLOG(1) <<  "In Function: "
                << __FUNCTION__
-               << ". Parent IAccessible interface is NULL. Returning failure";
+               << ". Parent IAccessible interface is nullptr. Returning failure";
       return E_FAIL;
     }
   }
@@ -554,7 +554,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_accState(VARIANT var_id,
 
   state->vt = VT_I4;
   state->lVal = target->ia_state_;
-  if (manager()->GetFocus(NULL) == this)
+  if (manager()->GetFocus(nullptr) == this)
     state->lVal |= STATE_SYSTEM_FOCUSED;
 
   return S_OK;
@@ -1069,7 +1069,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_accessibleAt(
     return S_OK;
   }
 
-  *accessible = NULL;
+  *accessible = nullptr;
   return E_INVALIDARG;
 }
 
@@ -2070,7 +2070,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_textAtOffset(
   if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
     *start_offset = 0;
     *end_offset = 0;
-    *text = NULL;
+    *text = nullptr;
     return S_FALSE;
   }
 
@@ -2100,7 +2100,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_textBeforeOffset(
   if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
     *start_offset = 0;
     *end_offset = 0;
-    *text = NULL;
+    *text = nullptr;
     return S_FALSE;
   }
 
@@ -2129,7 +2129,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_textAfterOffset(
   if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
     *start_offset = 0;
     *end_offset = 0;
-    *text = NULL;
+    *text = nullptr;
     return S_FALSE;
   }
 
@@ -2446,7 +2446,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_nodeInfo(
   if (GetString16Attribute(ui::AX_ATTR_HTML_TAG, &tag))
     *node_name = SysAllocString(tag.c_str());
   else
-    *node_name = NULL;
+    *node_name = nullptr;
 
   *name_space_id = 0;
   *node_value = SysAllocString(base::UTF8ToUTF16(value()).c_str());
@@ -2515,7 +2515,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_attributesForNames(
       }
     }
     if (!found) {
-      attrib_values[i] = NULL;
+      attrib_values[i] = nullptr;
     }
   }
   return S_OK;
@@ -2570,7 +2570,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_computedStyleForProperties(
           ui::AX_ATTR_DISPLAY);
       style_values[i] = SysAllocString(display.c_str());
     } else {
-      style_values[i] = NULL;
+      style_values[i] = nullptr;
     }
   }
 
@@ -2601,7 +2601,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_firstChild(ISimpleDOMNode** node)  {
     return E_INVALIDARG;
 
   if (PlatformChildCount() == 0) {
-    *node = NULL;
+    *node = nullptr;
     return S_FALSE;
   }
 
@@ -2617,7 +2617,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_lastChild(ISimpleDOMNode** node) {
     return E_INVALIDARG;
 
   if (PlatformChildCount() == 0) {
-    *node = NULL;
+    *node = nullptr;
     return S_FALSE;
   }
 
@@ -2635,7 +2635,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_previousSibling(
     return E_INVALIDARG;
 
   if (!GetParent() || GetIndexInParent() <= 0) {
-    *node = NULL;
+    *node = nullptr;
     return S_FALSE;
   }
 
@@ -2655,7 +2655,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_nextSibling(ISimpleDOMNode** node) {
       GetIndexInParent() < 0 ||
       GetIndexInParent() >= static_cast<int>(
           GetParent()->InternalChildCount()) - 1) {
-    *node = NULL;
+    *node = nullptr;
     return S_FALSE;
   }
 
@@ -2678,7 +2678,7 @@ STDMETHODIMP BrowserAccessibilityWin::get_childAt(
 
   BrowserAccessibility* child = PlatformGetChild(child_index);
   if (!child) {
-    *node = NULL;
+    *node = nullptr;
     return S_FALSE;
   }
 
@@ -2815,7 +2815,7 @@ STDMETHODIMP BrowserAccessibilityWin::QueryService(REFGUID guidService,
     return QueryInterface(riid, object);
   }
 
-  *object = NULL;
+  *object = nullptr;
   return E_FAIL;
 }
 
@@ -2866,29 +2866,29 @@ HRESULT WINAPI BrowserAccessibilityWin::InternalQueryInterface(
     void** object) {
   if (iid == IID_IAccessibleImage) {
     if (ia_role_ != ROLE_SYSTEM_GRAPHIC) {
-      *object = NULL;
+      *object = nullptr;
       return E_NOINTERFACE;
     }
   } else if (iid == IID_IAccessibleTable || iid == IID_IAccessibleTable2) {
     if (ia_role_ != ROLE_SYSTEM_TABLE) {
-      *object = NULL;
+      *object = nullptr;
       return E_NOINTERFACE;
     }
   } else if (iid == IID_IAccessibleTableCell) {
     if (ia_role_ != ROLE_SYSTEM_CELL) {
-      *object = NULL;
+      *object = nullptr;
       return E_NOINTERFACE;
     }
   } else if (iid == IID_IAccessibleValue) {
     if (ia_role_ != ROLE_SYSTEM_PROGRESSBAR &&
         ia_role_ != ROLE_SYSTEM_SCROLLBAR &&
         ia_role_ != ROLE_SYSTEM_SLIDER) {
-      *object = NULL;
+      *object = nullptr;
       return E_NOINTERFACE;
     }
   } else if (iid == IID_ISimpleDOMDocument) {
     if (ia_role_ != ROLE_SYSTEM_DOCUMENT) {
-      *object = NULL;
+      *object = nullptr;
       return E_NOINTERFACE;
     }
   }
@@ -3190,7 +3190,7 @@ BrowserAccessibilityWin* BrowserAccessibilityWin::NewReference() {
 BrowserAccessibilityWin* BrowserAccessibilityWin::GetTargetFromChildID(
     const VARIANT& var_id) {
   if (var_id.vt != VT_I4)
-    return NULL;
+    return nullptr;
 
   LONG child_id = var_id.lVal;
   if (child_id == CHILDID_SELF)