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

webkit/glue/image_decoder.h

Index: webkit/glue/image_decoder.h
diff --git a/webkit/glue/image_decoder.h b/webkit/glue/image_decoder.h
index 1f7f266f9ab4a59c11ca479c9d8614989f7fb516..9c9d9eee7395785c346ace23b54e63614b35fb6b 100644
--- a/webkit/glue/image_decoder.h
+++ b/webkit/glue/image_decoder.h
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <vector>
+
 #include "base/basictypes.h"
 #include "ui/gfx/size.h"
 #include "webkit/glue/webkit_glue_export.h"
@@ -28,6 +30,11 @@ class WEBKIT_GLUE_EXPORT ImageDecoder {
   // will be returned. Otherwise, an empty bitmap will be returned.
   SkBitmap Decode(const unsigned char* data, size_t size) const;
 
+  // Returns all frames found in the image represented by data. If there are
+  // multiple frames at the same size, only the first one is returned.
+  static std::vector<SkBitmap> DecodeAll(
+      const unsigned char* data, size_t size);
+
  private:
   // Size will be empty to get the largest possible size.
   gfx::Size desired_icon_size_;