SkWriter32: throw in the SkTDArray towel.

src/core/SkWriter32.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkReader32.h"
 #include "SkString.h"
 #include "SkWriter32.h"
@@ skipping 45 matching lines @@
 size_t SkWriter32::WriteStringSize(const char* str, size_t len) {
     if ((long)len < 0) {
         SkASSERT(str);
         len = strlen(str);
     }
     const size_t lenBytes = 4;    // we use 4 bytes to record the length
     // add 1 since we also write a terminating 0
     return SkAlign4(lenBytes + len + 1);
 }
 
-const size_t kMinBufferBytes = 4096;
-
 void SkWriter32::growToAtLeast(size_t size) {
     const bool wasExternal = (fExternal != NULL) && (fData == fExternal);
-    const size_t minCapacity = kMinBufferBytes +
-        SkTMax(size, fCapacity + (fCapacity >> 1));
 
-    // cause the buffer to grow
-    fInternal.setCountExact(minCapacity);
-    fData = fInternal.begin();
-    fCapacity = fInternal.reserved();
+    fCapacity = 4096 + SkTMax(size, fCapacity + (fCapacity / 2));
+    fInternal.realloc(fCapacity);
+    fData = fInternal.get();
+
     if (wasExternal) {
         // we were external, so copy in the data
         memcpy(fData, fExternal, fUsed);
     }
 }