Fix a number of issues with iOS build.

src/utils/ios/SkImageDecoder_iOS.mm

Index: src/utils/ios/SkImageDecoder_iOS.mm
diff --git a/src/utils/ios/SkImageDecoder_iOS.mm b/src/utils/ios/SkImageDecoder_iOS.mm
index f347e060c885e75c5b51e4b809381aa4b725772a..5e4261ff1db08cd66e90e1d0dff76fda88be70a0 100755
--- a/src/utils/ios/SkImageDecoder_iOS.mm
+++ b/src/utils/ios/SkImageDecoder_iOS.mm
@@ -29,7 +29,8 @@ bool SkImageDecoder_iOS::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
     
     const int width = uimage.size.width;
     const int height = uimage.size.height;
-    bm->setConfig(SkBitmap::kARGB_8888_Config, width, height);
+    SkColorType ct = SkBitmapConfigToColorType(SkBitmap::kARGB_8888_Config);
+    bm->setInfo(SkImageInfo::Make(width, height, ct, kPremul_SkAlphaType), 0);
     if (SkImageDecoder::kDecodeBounds_Mode == mode) {
         return true;
     }