Update to Chromium //base at Chromium commit 3e81715e6d3a4324362635aea46ce1f1a163cca1.

debug/debugger_posix.cc

Index: debug/debugger_posix.cc
diff --git a/debug/debugger_posix.cc b/debug/debugger_posix.cc
index 8599571e34575fc4d2271cdfbb0ca0be451e181a..a2e804f2e63b36112b1a9369bd6811aa2270b620 100644
--- a/debug/debugger_posix.cc
+++ b/debug/debugger_posix.cc
@@ -35,6 +35,7 @@
 #include <ostream>
 
 #include "base/basictypes.h"
+#include "base/debug/alias.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/posix/eintr_wrapper.h"
@@ -237,6 +238,12 @@ void BreakDebugger() {
   // NOTE: This code MUST be async-signal safe (it's used by in-process
   // stack dumping signal handler). NO malloc or stdio is allowed here.
 
+  // Linker's ICF feature may merge this function with other functions with the
+  // same definition (e.g. any function whose sole job is to call abort()) and
+  // it may confuse the crash report processing system. http://crbug.com/508489
+  static int static_variable_to_make_this_function_unique = 0;
+  base::debug::Alias(&static_variable_to_make_this_function_unique);
+
   DEBUG_BREAK();
 #if defined(OS_ANDROID) && !defined(OFFICIAL_BUILD)
   // For Android development we always build release (debug builds are