Add webkit/ api to request all frames in an image.

webkit/glue/image_decoder.cc

Index: webkit/glue/image_decoder.cc
diff --git a/webkit/glue/image_decoder.cc b/webkit/glue/image_decoder.cc
index 83b935c08a246248c41f83947d6aeae836ad230b..67f6ef245fa877f8dec96b19cc798172e6b0ca80 100644
--- a/webkit/glue/image_decoder.cc
+++ b/webkit/glue/image_decoder.cc
@@ -30,4 +30,15 @@ SkBitmap ImageDecoder::Decode(const unsigned char* data, size_t size) const {
   return image.getSkBitmap();
 }
 
+// static
+std::vector<SkBitmap> ImageDecoder::DecodeAll(
+      const unsigned char* data, size_t size) {
+  const WebKit::WebVector<WebImage>& images = WebImage::framesFromData(
+      WebData(reinterpret_cast<const char*>(data), size));
+  std::vector<SkBitmap> result;
+  for (size_t i = 0; i < images.size(); ++i)
+    result.push_back(images[i].getSkBitmap());
+  return result;
+}
+
 }  // namespace webkit_glue