No bug

r=mkaply, a=blizzard
Code from dainis - remove unused function - RequiresInvertedMask

gfx/src/os2/nsDrawingSurfaceOS2.cpp

@@ -103,12 +103,6 @@ nsresult nsDrawingSurfaceOS2::GetBitmap( HBITMAP &aBitmap)
    return NS_OK;
 }
 
-nsresult nsDrawingSurfaceOS2::RequiresInvertedMask( PRBool *aBool)
-{
-   *aBool = (PRBool) (gModuleData.lDisplayDepth <= 8);
-   return NS_OK;
-}
-
 // Offscreen surface --------------------------------------------------------
 
 nsOffscreenSurface::nsOffscreenSurface() : mDC(0), mBitmap(0),
@@ -516,8 +510,3 @@ nsresult nsPrintSurface::GetDimensions( PRUint32 *aWidth, PRUint32 *aHeight)
    return NS_OK;
 }
 
-nsresult nsPrintSurface::RequiresInvertedMask( PRBool *aBool)
-{
-   *aBool = PR_FALSE;
-   return NS_OK;
-}

gfx/src/os2/nsDrawingSurfaceOS2.h

@@ -70,7 +70,6 @@ class nsDrawingSurfaceOS2 : public nsIDrawingSurface
    void FlushFontCache();
 
    NS_IMETHOD GetBitmap( HBITMAP &aBitmap); // yuck (for blender, may go)
-   NS_IMETHOD RequiresInvertedMask( PRBool *aBool); // double yuck (images)
 
  protected:
    void DisposeFonts();     // MUST be called before disposing of PS
@@ -153,7 +152,6 @@ class nsPrintSurface : public nsOnscreenSurface
    virtual ~nsPrintSurface();
 
    NS_IMETHOD Init( HPS aPS, PRInt32 aWidth, PRInt32 aHeight);
-   NS_IMETHOD RequiresInvertedMask( PRBool *aNeedsIMask);
    NS_IMETHOD GetDimensions( PRUint32 *aWidth, PRUint32 *aHeight);
 };