Wires through ScrollbarCorner to NativeTheme.

BUG=333499
TEST=none
R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/149513010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247876 0039d316-1c4b-4281-b951-d872f2087c98

webkit/child/webfallbackthemeengine_impl.cc

@@ -35,6 +35,8 @@ static ui::NativeTheme::Part NativeThemePart(
       return ui::NativeTheme::kScrollbarHorizontalTrack;
     case WebFallbackThemeEngine::PartScrollbarVerticalTrack:
       return ui::NativeTheme::kScrollbarVerticalTrack;
+    case WebFallbackThemeEngine::PartScrollbarCorner:
+      return ui::NativeTheme::kScrollbarCorner;
     case WebFallbackThemeEngine::PartCheckbox:
       return ui::NativeTheme::kCheckbox;
     case WebFallbackThemeEngine::PartRadio:

webkit/child/webthemeengine_impl_android.cc

@@ -29,18 +29,10 @@ static ui::NativeTheme::Part NativeThemePart(
     case WebThemeEngine::PartScrollbarUpArrow:
       return ui::NativeTheme::kScrollbarUpArrow;
     case WebThemeEngine::PartScrollbarHorizontalThumb:
-      // Android doesn't draw scrollbars.
-      NOTREACHED();
-      return static_cast<ui::NativeTheme::Part>(0);
     case WebThemeEngine::PartScrollbarVerticalThumb:
-      // Android doesn't draw scrollbars.
-      NOTREACHED();
-      return static_cast<ui::NativeTheme::Part>(0);
     case WebThemeEngine::PartScrollbarHorizontalTrack:
-      // Android doesn't draw scrollbars.
-      NOTREACHED();
-      return static_cast<ui::NativeTheme::Part>(0);
     case WebThemeEngine::PartScrollbarVerticalTrack:
+    case WebThemeEngine::PartScrollbarCorner:
       // Android doesn't draw scrollbars.
       NOTREACHED();
       return static_cast<ui::NativeTheme::Part>(0);

webkit/child/webthemeengine_impl_default.cc

@@ -35,6 +35,8 @@ static ui::NativeTheme::Part NativeThemePart(
       return ui::NativeTheme::kScrollbarHorizontalTrack;
     case WebThemeEngine::PartScrollbarVerticalTrack:
       return ui::NativeTheme::kScrollbarVerticalTrack;
+    case WebThemeEngine::PartScrollbarCorner:
+      return ui::NativeTheme::kScrollbarCorner;
     case WebThemeEngine::PartCheckbox:
       return ui::NativeTheme::kCheckbox;
     case WebThemeEngine::PartRadio: