Decode ImageManager cached images on demand.

components/suggestions/image_encoder.h

Index: components/suggestions/image_encoder.h
diff --git a/components/suggestions/image_encoder.h b/components/suggestions/image_encoder.h
index f32314ab0e052c9528fb7c0470a50aa7dd555e0d..d0aa71d5f1c571fc0b47cbbf84a8792e7d5b9452 100644
--- a/components/suggestions/image_encoder.h
+++ b/components/suggestions/image_encoder.h
@@ -5,6 +5,7 @@
 #ifndef COMPONENTS_SUGGESTIONS_IMAGE_ENCODER_H_
 #define COMPONENTS_SUGGESTIONS_IMAGE_ENCODER_H_
 
+#include <stddef.h>
 #include <vector>
 
 class SkBitmap;
@@ -13,7 +14,12 @@ namespace suggestions {
 
 // From encoded bytes to SkBitmap. It's the caller's responsibility to delete
 // the bitmap.
-SkBitmap* DecodeJPEGToSkBitmap(const std::vector<unsigned char>& encoded_data);
+SkBitmap* DecodeJPEGToSkBitmap(const void* encoded_data, size_t size);
+
+inline SkBitmap* DecodeJPEGToSkBitmap(
+    const std::vector<unsigned char>& encoded_data) {
+  return DecodeJPEGToSkBitmap(&encoded_data[0], encoded_data.size());
+}
 
 // From SkBitmap to a vector of JPEG-encoded bytes, |dst|.
 bool EncodeSkBitmapToJPEG(const SkBitmap& bitmap,