This patch is to enable the vtune profiling tool support in chrome.

content/renderer/renderer_main_platform_delegate_linux.cc

 // 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.
 
 #include "content/renderer/renderer_main_platform_delegate.h"
 
 #include <errno.h>
 #include <sys/stat.h>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "content/common/sandbox_linux.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/sandbox_init.h"
 
+#ifdef ENABLE_VTUNE_JIT_INTERFACE
+#include "v8/src/third_party/vtune/v8-vtune.h"
+#endif
+
 namespace content {
 
 RendererMainPlatformDelegate::RendererMainPlatformDelegate(
     const MainFunctionParams& parameters)
     : parameters_(parameters) {
 }
 
 RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
 }
 
 void RendererMainPlatformDelegate::PlatformInitialize() {
+#ifdef ENABLE_VTUNE_JIT_INTERFACE
+  const CommandLine& command_line = parameters_.command_line;
+  if (command_line.HasSwitch(switches::kEnableVtune))
+    vTune::InitializeVtuneForV8();
+#endif
 }
 
 void RendererMainPlatformDelegate::PlatformUninitialize() {
 }
 
 bool RendererMainPlatformDelegate::InitSandboxTests(bool no_sandbox) {
   // The sandbox is started in the zygote process: zygote_main_linux.cc
   // http://code.google.com/p/chromium/wiki/LinuxSUIDSandbox
   return true;
 }
@@ skipping 38 matching lines @@
     errno = 0;
     // This should normally return EBADF since the first argument is bogus,
     // but we know that under the seccomp-bpf sandbox, this should return EPERM.
     CHECK_EQ(fchmod(-1, 07777), -1);
     CHECK_EQ(errno, EPERM);
   }
 #endif  // __x86_64__
 }
 
 }  // namespace content