Support the Syzygy instrumenting profiler.

chrome/common/profiling.cc

Index: chrome/common/profiling.cc
diff --git a/chrome/common/profiling.cc b/chrome/common/profiling.cc
index b15cc963482625f8661fbb261dfdc6dc3eba50a9..bc678737e841f313f93199e1d0dc6fa3deed89c4 100644
--- a/chrome/common/profiling.cc
+++ b/chrome/common/profiling.cc
@@ -13,6 +13,7 @@
 #include "base/string_util.h"
 #include "base/threading/thread.h"
 #include "chrome/common/chrome_switches.h"
+#include "v8/include/v8.h"
 
 namespace {
 std::string GetProfileName() {
@@ -102,6 +103,17 @@ void Profiling::ProcessStarted() {
   std::string process_type =
       command_line.GetSwitchValueASCII(switches::kProcessType);
 
+  // Establish the V8 return address resolution hook if we're
+  // an instrumented binary.
+  if (base::debug::IsBinaryInstrumented()) {
+    base::debug::ReturnAddressLocationResolver resolve_func =
+        base::debug::GetProfilerReturnAddrResolutionFunc();
+
+    if (resolve_func != NULL) {
+      v8::V8::SetReturnAddressLocationResolver(resolve_func);
+    }
+  }
+
   if (command_line.HasSwitch(switches::kProfilingAtStart)) {
     std::string process_type_to_start =
         command_line.GetSwitchValueASCII(switches::kProfilingAtStart);