Adds an iOS implementation of gfx::Image.

ui/gfx/image/image_util.cc

Index: ui/gfx/image/image_util.cc
diff --git a/ui/gfx/image/image_util.cc b/ui/gfx/image/image_util.cc
index 6403419ed4610cbf771e47ea4f5d25ede8648834..04bc5a284b26c31557e61b5c5bac1094e8630230 100644
--- a/ui/gfx/image/image_util.cc
+++ b/ui/gfx/image/image_util.cc
@@ -17,6 +17,14 @@ Image* ImageFromPNGEncodedData(const unsigned char* input, size_t input_size) {
   return image;
 }
 
+bool PNGEncodedDataFromImage(const Image& image,
+                             std::vector<unsigned char>* dst) {
+  *dst = *image.ToImagePNG();
+  return !dst->empty();
+}
+
+// The iOS implementations of the JPEG functions are in image_util_ios.mm.
+#if !defined(OS_IOS)
 Image ImageFromJPEGEncodedData(const unsigned char* input, size_t input_size) {
   scoped_ptr<SkBitmap> bitmap(gfx::JPEGCodec::Decode(input, input_size));
   if (bitmap.get())
@@ -25,12 +33,6 @@ Image ImageFromJPEGEncodedData(const unsigned char* input, size_t input_size) {
   return Image();
 }
 
-bool PNGEncodedDataFromImage(const Image& image,
-                             std::vector<unsigned char>* dst) {
-  *dst = *image.ToImagePNG();
-  return !dst->empty();
-}
-
 bool JPEGEncodedDataFromImage(const Image& image, int quality,
                               std::vector<unsigned char>* dst) {
   const SkBitmap& bitmap = *image.ToSkBitmap();
@@ -46,5 +48,6 @@ bool JPEGEncodedDataFromImage(const Image& image, int quality,
           static_cast<int>(bitmap.rowBytes()), quality,
           dst);
 }
+#endif  // !defined(OS_IOS)
 
 }