IWYU for some test files starting with 'C'.

Change-Id: I9a9596f7a941cdd8f01e055965c70a4b24438499
Reviewed-on: https://skia-review.googlesource.com/113746
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
diff --git a/tests/CodecPartialTest.cpp b/tests/CodecPartialTest.cpp
index 561dddd..f33f8ba 100644
--- a/tests/CodecPartialTest.cpp
+++ b/tests/CodecPartialTest.cpp
@@ -5,18 +5,23 @@
  * found in the LICENSE file.
  */
 
+#include "FakeStreams.h"
+#include "Resources.h"
 #include "SkBitmap.h"
 #include "SkCodec.h"
 #include "SkData.h"
 #include "SkImageInfo.h"
 #include "SkMakeUnique.h"
-#include "SkRWBuffer.h"
-#include "SkString.h"
-
-#include "FakeStreams.h"
-#include "Resources.h"
+#include "SkRefCnt.h"
+#include "SkStream.h"
+#include "SkTypes.h"
 #include "Test.h"
 
+#include <cstring>
+#include <memory>
+#include <utility>
+#include <vector>
+
 static SkImageInfo standardize_info(SkCodec* codec) {
     SkImageInfo defaultInfo = codec->getInfo();
     // Note: This drops the SkColorSpace, allowing the equality check between two