Changed free(buffer) to delete [] buffer.

This bug (mismatch between new[] and free) was found by running VC++'s /analyze on all of Chrome.

BUG=chromium:427616
LOG=N
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/686193004

Patch from Bruce Dawson <brucedawson@chromium.org>.

Cr-Commit-Position: refs/heads/master@{#25003}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25003 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects-printer.cc

@@ -595,7 +595,7 @@ char* String::ToAsciiArray() {
   // Static so that subsequent calls frees previously allocated space.
   // This also means that previous results will be overwritten.
   static char* buffer = NULL;
-  if (buffer != NULL) free(buffer);
+  if (buffer != NULL) delete[] buffer;
   buffer = new char[length()+1];
   WriteToFlat(this, reinterpret_cast<uint8_t*>(buffer), 0, length());
   buffer[length()] = 0;