focus reverse traversal was not working for TextfieldViews.

views/controls/textfield/textfield.cc

Index: views/controls/textfield/textfield.cc
diff --git a/views/controls/textfield/textfield.cc b/views/controls/textfield/textfield.cc
index c4ab7996b449cdbd2e8b07b2284f5d903a6509b8..9da78ecd900ad97ae335ad234d3fe6ec67995a07 100644
--- a/views/controls/textfield/textfield.cc
+++ b/views/controls/textfield/textfield.cc
@@ -261,7 +261,7 @@ gfx::Size Textfield::GetPreferredSize() {
 }
 
 bool Textfield::IsFocusable() const {
-  return IsEnabled() && !read_only_;
+  return View::IsFocusable() && !read_only_;
 }
 
 void Textfield::AboutToRequestFocusFromTabTraversal(bool reverse) {
@@ -290,6 +290,29 @@ void Textfield::PaintFocusBorder(gfx::Canvas* canvas) {
     View::PaintFocusBorder(canvas);
 }
 
+bool Textfield::OnKeyPressed(const views::KeyEvent& e) {
+  return native_wrapper_ && native_wrapper_->HandleKeyPressed(e);
+}
+
+bool Textfield::OnKeyReleased(const views::KeyEvent& e) {
+  return native_wrapper_ && native_wrapper_->HandleKeyReleased(e);
+}
+
+void Textfield::WillGainFocus() {
+  if (native_wrapper_)
+    native_wrapper_->HandleWillGainFocus();
+}
+
+void Textfield::DidGainFocus() {
+  if (native_wrapper_)
+    native_wrapper_->HandleDidGainFocus();
+}
+
+void Textfield::WillLoseFocus() {
+  if (native_wrapper_)
+    native_wrapper_->HandleWillLoseFocus();
+}
+
 AccessibilityTypes::Role Textfield::GetAccessibleRole() {
   return AccessibilityTypes::ROLE_TEXT;
 }
@@ -316,12 +339,11 @@ void Textfield::SetEnabled(bool enabled) {
 }
 
 void Textfield::Focus() {
-  if (native_wrapper_) {
-    // Forward the focus to the wrapper if it exists.
-    native_wrapper_->SetFocus();
-  } else {
-    // If there is no wrapper, cause the RootView to be focused so that we still
-    // get keyboard messages.
+  // Forward the focus to the wrapper if it exists.
+  if (!native_wrapper_ || !native_wrapper_->SetFocus()) {
+    // If there is no wrapper or the wrapper din't take focus, call
+    // View::Focus to clear the native focus so that we still get
+    // keyboard messages.
     View::Focus();
   }
 }