Bug 1460116 - Remove ShouldHideScrollbars. r=jimm

MozReview-Commit-ID: 7v6Eylefk4t

--HG--
extra : rebase_source : f37e94e205e7e589c3a47f282c57b725d65914d9

gfx/src/nsITheme.h

@@ -216,12 +216,6 @@ public:
     * Should we insert a dropmarker inside of combobox button?
    */
   virtual bool ThemeNeedsComboboxDropmarker()=0;
-
-  /**
-   * Should we hide scrollbars?
-   */
-  virtual bool ShouldHideScrollbars()
-  { return false; }
 };
 
 NS_DEFINE_STATIC_IID_ACCESSOR(nsITheme, NS_ITHEME_IID)

layout/generic/nsGfxScrollFrame.cpp

@@ -3092,12 +3092,6 @@ ScrollFrameHelper::AppendScrollPartsTo(nsDisplayListBuilder*   aBuilder,
                                        bool                    aCreateLayer,
                                        bool                    aPositioned)
 {
-  nsITheme* theme = mOuter->PresContext()->GetTheme();
-  if (theme &&
-      theme->ShouldHideScrollbars()) {
-    return;
-  }
-
   bool overlayScrollbars =
     LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars) != 0;
 

widget/windows/WinUtils.cpp

@@ -1769,13 +1769,6 @@ WinUtils::SetupKeyModifiersSequence(nsTArray<KeyPair>* aArray,
   }
 }
 
-/* static */
-bool
-WinUtils::ShouldHideScrollbars()
-{
-  return false;
-}
-
 // This is in use here and in dom/events/TouchEvent.cpp
 /* static */
 uint32_t

widget/windows/WinUtils.h

@@ -489,8 +489,6 @@ public:
 
   static void Initialize();
 
-  static bool ShouldHideScrollbars();
-
   /**
    * This function normalizes the input path, converts short filenames to long
    * filenames, and substitutes environment variables for system paths.

widget/windows/nsNativeThemeWin.cpp

@@ -2622,12 +2622,6 @@ nsNativeThemeWin::ThemeGeometryTypeForWidget(nsIFrame* aFrame,
   }
 }
 
-bool
-nsNativeThemeWin::ShouldHideScrollbars()
-{
-  return WinUtils::ShouldHideScrollbars();
-}
-
 nsITheme::Transparency
 nsNativeThemeWin::GetWidgetTransparency(nsIFrame* aFrame, uint8_t aWidgetType)
 {

widget/windows/nsNativeThemeWin.h

@@ -83,8 +83,6 @@ public:
   virtual ThemeGeometryType ThemeGeometryTypeForWidget(nsIFrame* aFrame,
                                                        uint8_t aWidgetType) override;
 
-  virtual bool ShouldHideScrollbars() override;
-
   nsNativeThemeWin();
 
 protected: