Re-land r93365 - add RefCountedString

base/debug/trace_event.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/debug/trace_event.h"
 
 #if defined(OS_WIN)
 #include "base/debug/trace_event_win.h"
 #endif
 #include "base/format_macros.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/process_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
+#include "base/stl_util.h"
 #include "base/time.h"
 
 #define USE_UNRELIABLE_NOW
 
 namespace base {
 namespace debug {
 
 // Controls the number of trace events we will buffer in-memory
 // before throwing them away.
 const size_t kTraceEventBufferSize = 500000;
@@ skipping 138 matching lines @@
     alloc_size += GetAllocLength(arg1_name);
     alloc_size += GetAllocLength(arg2_name);
   }
   // We always take a copy of string arg_vals, even if |copy| was not set.
   if (arg1_val.type() == TraceValue::TRACE_TYPE_STRING)
     alloc_size += GetAllocLength(arg1_val.as_string());
   if (arg2_val.type() == TraceValue::TRACE_TYPE_STRING)
     alloc_size += GetAllocLength(arg2_val.as_string());
 
   if (alloc_size) {
-    parameter_copy_storage_ = new RefCountedBytes;
-    parameter_copy_storage_->data.resize(alloc_size);
-    char* ptr = reinterpret_cast<char*>(&parameter_copy_storage_->data[0]);
+    parameter_copy_storage_ = new base::RefCountedString;
+    parameter_copy_storage_->data().resize(alloc_size);
+    char* ptr = string_as_array(&parameter_copy_storage_->data());
     const char* end = ptr + alloc_size;
     if (copy) {
       CopyTraceEventParameter(&ptr, &name_, end);
       CopyTraceEventParameter(&ptr, &arg_names_[0], end);
       CopyTraceEventParameter(&ptr, &arg_names_[1], end);
     }
     if (arg_values_[0].type() == TraceValue::TRACE_TYPE_STRING)
       CopyTraceEventParameter(&ptr, arg_values_[0].as_assignable_string(), end);
     if (arg_values_[1].type() == TraceValue::TRACE_TYPE_STRING)
       CopyTraceEventParameter(&ptr, arg_values_[1].as_assignable_string(), end);
@@ skipping 277 matching lines @@
         p_data_->name,
         NULL, 0, NULL, 0,
         p_data_->threshold_begin_id, p_data_->threshold, false);
   }
 }
 
 } // namespace internal
 
 }  // namespace debug
 }  // namespace base