Revert "skia: add heif decoding support"

This reverts commit c2a954290dc3888f877a047098b84c24363895fb.

Reason for revert: both Android and Google3 rolls cannot compile.  Android cannot cast std::unique_ptr<T> to T*, Google3 cannot find HeifDecoderAPI.h.

Original change's description:
> skia: add heif decoding support
> 
> Bug: b/64077740
> Change-Id: I11e0243bcc4c21c0aa5aa29a719dd0fcba7ae6f7
> Reviewed-on: https://skia-review.googlesource.com/35123
> Reviewed-by: Chong Zhang <chz@google.com>
> Reviewed-by: Leon Scroggins <scroggo@google.com>
> Commit-Queue: Chong Zhang <chz@google.com>
> Commit-Queue: Leon Scroggins <scroggo@google.com>

TBR=scroggo@google.com,chz@google.com

Change-Id: Id98f025e63daec50408186000453d1695170f7a8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: b/64077740
Reviewed-on: https://skia-review.googlesource.com/35741
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/src/codec/SkCodec.cpp b/src/codec/SkCodec.cpp
index 7dc10854d2..2b6108250c 100644
--- a/src/codec/SkCodec.cpp
+++ b/src/codec/SkCodec.cpp
@@ -23,7 +23,6 @@
 #include "SkStream.h"
 #include "SkWbmpCodec.h"
 #include "SkWebpCodec.h"
-#include "SkHeifCodec.h"
 
 struct DecoderProc {
     bool (*IsFormat)(const void*, size_t);
@@ -42,12 +41,13 @@ static const DecoderProc gDecoderProcs[] = {
     { SkIcoCodec::IsIco, SkIcoCodec::MakeFromStream },
 #endif
     { SkBmpCodec::IsBmp, SkBmpCodec::MakeFromStream },
-    { SkWbmpCodec::IsWbmp, SkWbmpCodec::MakeFromStream },
-#ifdef SK_HAS_HEIF_LIBRARY
-    { SkHeifCodec::IsHeif, SkHeifCodec::MakeFromStream },
-#endif
+    { SkWbmpCodec::IsWbmp, SkWbmpCodec::MakeFromStream }
 };
 
+size_t SkCodec::MinBufferedBytesNeeded() {
+    return WEBP_VP8_HEADER_SIZE;
+}
+
 std::unique_ptr<SkCodec> SkCodec::MakeFromStream(std::unique_ptr<SkStream> stream,
                                                  Result* outResult, SkPngChunkReader* chunkReader) {
     Result resultStorage;
@@ -60,7 +60,9 @@ std::unique_ptr<SkCodec> SkCodec::MakeFromStream(std::unique_ptr<SkStream> strea
         return nullptr;
     }
 
-    constexpr size_t bytesToRead = MinBufferedBytesNeeded();
+    // 14 is enough to read all of the supported types.
+    const size_t bytesToRead = 14;
+    SkASSERT(bytesToRead <= MinBufferedBytesNeeded());
 
     char buffer[bytesToRead];
     size_t bytesRead = stream->peek(buffer, bytesToRead);