Update V8 to r6101 as required by WebKit r74534

Change-Id: I7f84af8dd732f11898fd644b2c2b1538914cb78d
diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
index ff5d83b..f84e80d 100644
--- a/src/platform-solaris.cc
+++ b/src/platform-solaris.cc
@@ -52,6 +52,7 @@
 #include "v8.h"
 
 #include "platform.h"
+#include "vm-state-inl.h"
 
 
 // It seems there is a bug in some Solaris distributions (experienced in
@@ -601,10 +602,9 @@
 };
 
 
-Sampler::Sampler(int interval, bool profiling)
+Sampler::Sampler(int interval)
     : interval_(interval),
-      profiling_(profiling),
-      synchronous_(profiling),
+      profiling_(false),
       active_(false),
       samples_taken_(0) {
   data_ = new PlatformData();