Print stack traces in child processes when browser tests failed.

base/debug/stack_trace.h

 // Copyright (c) 2012 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.
 
 #ifndef BASE_DEBUG_STACK_TRACE_H_
 #define BASE_DEBUG_STACK_TRACE_H_
 
 #include <iosfwd>
 #include <string>
 
 #include "base/base_export.h"
 #include "build/build_config.h"
 
 #if defined(OS_POSIX)
 #include <unistd.h>
 #endif
 
 #if defined(OS_WIN)
 struct _EXCEPTION_POINTERS;
 struct _CONTEXT;
 #endif
 
 namespace base {
 namespace debug {
 
 // Enables stack dump to console output on exception and signals.
 // When enabled, the process will quit immediately. This is meant to be used in
 // unit_tests only! This is not thread-safe: only call from main thread.
+// In sandboxed processes, this has to be called before the sandbox is turned
+// on.
+// Calling this function on Linux opens /proc/self/maps and caches its
+// contents. In non-official builds, this function also opens the object files
+// that are loaded in memory and caches their file descriptors (this cannot be
+// done in official builds because it has security implications).
 BASE_EXPORT bool EnableInProcessStackDumping();
 
-// A different version of EnableInProcessStackDumping that also works for
-// sandboxed processes.  For more details take a look at the description
-// of EnableInProcessStackDumping.
-// Calling this function on Linux opens /proc/self/maps and caches its
-// contents. In DEBUG builds, this function also opens the object files that
-// are loaded in memory and caches their file descriptors (this cannot be
-// done in official builds because it has security implications).
-BASE_EXPORT bool EnableInProcessStackDumpingForSandbox();
-
 // A stacktrace can be helpful in debugging. For example, you can include a
 // stacktrace member in a object (probably around #ifndef NDEBUG) so that you
 // can later see where the given object was created from.
 class BASE_EXPORT StackTrace {
  public:
   // Creates a stacktrace from the current location.
   StackTrace();
 
   // Creates a stacktrace from an existing array of instruction
   // pointers (such as returned by Addresses()).  |count| will be
   // trimmed to |kMaxTraces|.
   StackTrace(const void* const* trace, size_t count);
 
 #if defined(OS_WIN)
   // Creates a stacktrace for an exception.
   // Note: this function will throw an import not found (StackWalk64) exception
   // on system without dbghelp 5.1.
-  StackTrace(const _EXCEPTION_POINTERS* exception_pointers);
-  StackTrace(const _CONTEXT* context);
+  StackTrace(_EXCEPTION_POINTERS* exception_pointers);
+  StackTrace(_CONTEXT* context);
 #endif
 
   // Copying and assignment are allowed with the default functions.
 
   ~StackTrace();
 
   // Gets an array of instruction pointer values. |*count| will be set to the
   // number of elements in the returned array.
   const void* const* Addresses(size_t* count) const;
 
@@ skipping 40 matching lines @@
                          int base,
                          size_t padding);
 #endif  // defined(OS_POSIX) && !defined(OS_ANDROID)
 
 }  // namespace internal
 
 }  // namespace debug
 }  // namespace base
 
 #endif  // BASE_DEBUG_STACK_TRACE_H_