ui: Move NativeTheme files into ui/base/native_theme/ directory.

ui/views/controls/label.cc

Index: ui/views/controls/label.cc
diff --git a/ui/views/controls/label.cc b/ui/views/controls/label.cc
index ac40fe5827c4f92f078ba2bb9246a6dcc1d02e0d..21bf14d7a74d41a6fff6a8ac5ab98107e4b64726 100644
--- a/ui/views/controls/label.cc
+++ b/ui/views/controls/label.cc
@@ -21,7 +21,7 @@
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/insets.h"
-#include "ui/gfx/native_theme.h"
+#include "ui/base/native_theme/native_theme.h"
 #include "ui/views/background.h"
 
 namespace views {
@@ -359,12 +359,12 @@ void Label::Init(const string16& text, const gfx::Font& font) {
   contains_mouse_ = false;
   font_ = font;
   text_size_valid_ = false;
-  requested_enabled_color_ = gfx::NativeTheme::instance()->GetSystemColor(
-      gfx::NativeTheme::kColorId_LabelEnabledColor);
-  requested_disabled_color_ = gfx::NativeTheme::instance()->GetSystemColor(
-      gfx::NativeTheme::kColorId_LabelDisabledColor);
-  background_color_ = gfx::NativeTheme::instance()->GetSystemColor(
-      gfx::NativeTheme::kColorId_LabelBackgroundColor);
+  requested_enabled_color_ = ui::NativeTheme::instance()->GetSystemColor(
+      ui::NativeTheme::kColorId_LabelEnabledColor);
+  requested_disabled_color_ = ui::NativeTheme::instance()->GetSystemColor(
+      ui::NativeTheme::kColorId_LabelDisabledColor);
+  background_color_ = ui::NativeTheme::instance()->GetSystemColor(
+      ui::NativeTheme::kColorId_LabelBackgroundColor);
   auto_color_readability_ = true;
   RecalculateColors();
   horiz_alignment_ = ALIGN_CENTER;