use new readPixels, as old version using Config8888 is deprecated

Source/platform/graphics/ImageBuffer.cpp

Index: Source/platform/graphics/ImageBuffer.cpp
diff --git a/Source/platform/graphics/ImageBuffer.cpp b/Source/platform/graphics/ImageBuffer.cpp
index 8b36a9d13a53166dba14682903eda09c6d99d9e4..e4cc59703a4724c673d2d0cc9fdb7a6fc93c2f99 100644
--- a/Source/platform/graphics/ImageBuffer.cpp
+++ b/Source/platform/graphics/ImageBuffer.cpp
@@ -270,25 +270,17 @@ PassRefPtr<Uint8ClampedArray> getImageData(const IntRect& rect, GraphicsContext*
 
     RefPtr<Uint8ClampedArray> result = Uint8ClampedArray::createUninitialized(rect.width() * rect.height() * 4);
 
-    unsigned char* data = result->data();
-
     if (rect.x() < 0
         || rect.y() < 0
         || rect.maxX() > size.width()
         || rect.maxY() > size.height())
         result->zeroFill();
 
-    unsigned destBytesPerRow = 4 * rect.width();
-    SkBitmap destBitmap;
-    destBitmap.installPixels(SkImageInfo::MakeN32Premul(rect.width(), rect.height()), data, destBytesPerRow);
-
-    SkCanvas::Config8888 config8888;
-    if (multiplied == Premultiplied)
-        config8888 = SkCanvas::kRGBA_Premul_Config8888;
-    else
-        config8888 = SkCanvas::kRGBA_Unpremul_Config8888;
+    SkAlphaType = (multiplied == Premultiplied) ? kPremul_SkAlphaType : kUnpremul_SkAlphaType;

[f(malita), 2014/03/18 16:08:24]

SkAlphaType alphaType = ...

[reed1, 2014/03/18 19:39:38]

Doh!

+    SkImageInfo info = SkImageInfo::Make(rect.width(), rect.height(), kRGBA_8888_SkColorType, alphaType);
 
-    context->readPixels(&destBitmap, rect.x(), rect.y(), config8888);
+    if (!context->readPixels(info, result->data(), 4 * rect.width(), rect.x(), rect.y()))
+        return nullptr;
     return result.release();
 }