Add Windows commandline switch --enable-views-textfield.

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index 66291060b17b615696ef37256aa8b715e2df19f2..8b3a254f2d301325b478749aa621b2fdcc0ac18d 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -6,15 +6,18 @@
 
 #include <string>
 
+#include "base/command_line.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/base/range/range.h"
+#include "ui/base/ui_base_switches.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/selection_model.h"
 #include "ui/views/controls/native/native_view_host.h"
+#include "ui/views/controls/textfield/native_textfield_views.h"
 #include "ui/views/controls/textfield/native_textfield_wrapper.h"
 #include "ui/views/controls/textfield/textfield_controller.h"
 #include "ui/views/widget/widget.h"
@@ -23,7 +26,6 @@
 #include "base/win/win_util.h"
 // TODO(beng): this should be removed when the OS_WIN hack from
 // ViewHierarchyChanged is removed.
-#include "ui/views/controls/textfield/native_textfield_views.h"
 #include "ui/views/controls/textfield/native_textfield_win.h"
 #endif
 
@@ -32,6 +34,13 @@ namespace {
 // Default placeholder text color.
 const SkColor kDefaultPlaceholderTextColor = SK_ColorLTGRAY;
 
+#if defined(OS_WIN) && !defined(USE_AURA)
+bool UseNativeTextfieldViews() {
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  return command_line->HasSwitch(switches::kEnableViewsTextfield);
+}
+#endif
+
 }  // namespace
 
 namespace views {
@@ -454,12 +463,13 @@ void Textfield::ViewHierarchyChanged(bool is_add, View* parent, View* child) {
     UpdateAllProperties();
 
 #if defined(OS_WIN) && !defined(USE_AURA)
-    // TODO(beng): remove this once NativeTextfieldWin subclasses
+    // TODO(beng): Remove this once NativeTextfieldWin subclasses
     // NativeControlWin. This is currently called to perform post-AddChildView
     // initialization for the wrapper.
     //
     // Remove the include for native_textfield_win.h above when you fix this.
-    static_cast<NativeTextfieldWin*>(native_wrapper_)->AttachHack();
+    if (!UseNativeTextfieldViews())
+      static_cast<NativeTextfieldWin*>(native_wrapper_)->AttachHack();
 #endif
   }
 }
@@ -468,4 +478,17 @@ std::string Textfield::GetClassName() const {
   return kViewClassName;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// NativeTextfieldWrapper, public:
+
+// static
+NativeTextfieldWrapper* NativeTextfieldWrapper::CreateWrapper(
+    Textfield* field) {
+#if defined(OS_WIN) && !defined(USE_AURA)
+  if (!UseNativeTextfieldViews())
+    return new NativeTextfieldWin(field);
+#endif
+  return new NativeTextfieldViews(field);
+}
+
 }  // namespace views