Do not consolidate data in BMPImageDecoder

Source/platform/image-decoders/FastSharedBufferReader.h

Index: Source/platform/image-decoders/FastSharedBufferReader.h
diff --git a/Source/platform/image-decoders/FastSharedBufferReader.h b/Source/platform/image-decoders/FastSharedBufferReader.h
index 254476b435615daeabbfc07fce8ded953dd8729d..3e2099a58303df7b06b909ad9543aecc43ae94cc 100644
--- a/Source/platform/image-decoders/FastSharedBufferReader.h
+++ b/Source/platform/image-decoders/FastSharedBufferReader.h
@@ -46,6 +46,8 @@ class PLATFORM_EXPORT FastSharedBufferReader {
 public:
     FastSharedBufferReader(PassRefPtr<SharedBuffer> data);
 
+    void setData(PassRefPtr<SharedBuffer>);
+
     // Returns a consecutive buffer that carries the data starting
     // at |dataPosition| with |length| bytes.
     // This method returns a pointer to a memory segment stored in