Remove uses of SkBitmap::Config (deprecated) from core/ and platform/.

Source/platform/graphics/UnacceleratedImageBufferSurface.cpp

Index: Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
diff --git a/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
index 40812df5e776038dbafc423a578370ea08678312..468576d35832492d755d23f524380f1d27a5b724 100644
--- a/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
+++ b/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp
@@ -40,8 +40,7 @@ UnacceleratedImageBufferSurface::UnacceleratedImageBufferSurface(const IntSize&
     : ImageBufferSurface(size, opacityMode)
 {
     SkBitmap bitmap;
-    bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
-    bitmap.allocPixels();
+    bitmap.allocN32Pixels(size.width(), size.height());

[reed1, 2014/03/17 13:25:18]

allocN32Pixels returns false on error, so you can use that to know if you should
return early.

if (!bitmap.allocN32Pixels(...)) return;

Alternatively, you perhaps should call SkCanvas::NewRasterN32(...) here, which
returns NULL on failure, skipping the need to create a temp bitmap which you
(the caller) don't need.

[jbroman, 2014/03/17 16:46:38]

Done. Didn't realize SkCanvas::NewRasterN32 existed. Refactored in a way that
should not affect the overall behaviour of this constructor.

     if (bitmap.isNull())
         return;
     m_canvas = adoptPtr(new SkCanvas(bitmap));