views: Add OnEnabledChanged() method to View class.

views/controls/progress_bar.cc

Index: views/controls/progress_bar.cc
diff --git a/views/controls/progress_bar.cc b/views/controls/progress_bar.cc
index b8353b640b82d0e39e87c5e6caacaf46695d44af..46b89a2f684acfb6db8371cc31c5ffa6d75f6e0c 100644
--- a/views/controls/progress_bar.cc
+++ b/views/controls/progress_bar.cc
@@ -9,8 +9,8 @@
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
-#include "third_party/skia/include/effects/SkGradientShader.h"
 #include "third_party/skia/include/effects/SkBlurMaskFilter.h"
+#include "third_party/skia/include/effects/SkGradientShader.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/color_utils.h"
@@ -304,10 +304,8 @@ bool ProgressBar::GetTooltipText(const gfx::Point& p, std::wstring* tooltip) {
   return !tooltip_text_.empty();
 }
 
-void ProgressBar::SetEnabled(bool enabled) {
-  if (enabled == enabled_)
-    return;
-  View::SetEnabled(enabled);
+void ProgressBar::OnEnabledChanged() {
+  View::OnEnabledChanged();
   // TODO(denisromanov): Need to switch progress bar color here?
 }