Revert of IWYU: 'core' target, files starting A-C.

include/core/SkTypes.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkTypes_DEFINED
 #define SkTypes_DEFINED
 
@@ skipping 127 matching lines @@
 #else
     #define SkDEVCODE(code)
 #endif
 
 #ifdef SK_IGNORE_TO_STRING
     #define SK_TO_STRING_NONVIRT()
     #define SK_TO_STRING_VIRT()
     #define SK_TO_STRING_PUREVIRT()
     #define SK_TO_STRING_OVERRIDE()
 #else
-    class SkString;
     // the 'toString' helper functions convert Sk* objects to human-readable
     // form in developer mode
     #define SK_TO_STRING_NONVIRT() void toString(SkString* str) const;
     #define SK_TO_STRING_VIRT() virtual void toString(SkString* str) const;
     #define SK_TO_STRING_PUREVIRT() virtual void toString(SkString* str) const = 0;
     #define SK_TO_STRING_OVERRIDE() void toString(SkString* str) const override;
 #endif
 
 template <bool>
 struct SkCompileAssert {
@@ skipping 523 matching lines @@
 private:
     void*       fPtr;
     size_t      fSize;  // can be larger than the requested size (see kReuse)
     uint32_t    fStorage[(kSize + 3) >> 2];
 };
 // Can't guard the constructor because it's a template class.
 
 #endif /* C++ */
 
 #endif