Make fatal out of memory messages uniform.

runtime/platform/text_buffer.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/text_buffer.h"
 
 #include "platform/assert.h"
 #include "platform/globals.h"
 #include "platform/utils.h"
 #include "vm/os.h"
 #include "vm/unicode.h"
 
 namespace dart {
 
 TextBuffer::TextBuffer(intptr_t buf_size) {
   ASSERT(buf_size > 0);
   buf_ = reinterpret_cast<char*>(malloc(buf_size));
+  if (buf_ == NULL) {
+    OUT_OF_MEMORY();
+  }
   buf_size_ = buf_size;
   Clear();
 }
 
 
 TextBuffer::~TextBuffer() {
   free(buf_);
   buf_ = NULL;
 }
 
@@ skipping 117 matching lines @@
 void TextBuffer::EnsureCapacity(intptr_t len) {
   intptr_t remaining = buf_size_ - msg_len_;
   if (remaining <= len) {
     const int kBufferSpareCapacity = 64;  // Somewhat arbitrary.
     // TODO(turnidge): do we need to guard against overflow or other
     // security issues here? Text buffers are used by the debugger
     // to send user-controlled data (e.g. values of string variables) to
     // the debugger front-end.
     intptr_t new_size = buf_size_ + len + kBufferSpareCapacity;
     char* new_buf = reinterpret_cast<char*>(realloc(buf_, new_size));
-    ASSERT(new_buf != NULL);
+    if (new_buf == NULL) {
+      OUT_OF_MEMORY();
+    }
     buf_ = new_buf;
     buf_size_ = new_size;
   }
 }
 
 }  // namespace dart