Drop dependency on Isolate* from platform.h

src/log.cc

Index: src/log.cc
diff --git a/src/log.cc b/src/log.cc
index f6dfd2161d89b425c89b97f741acf8a3160b3a05..05d8f7a88710c65a2df18bef3bd21c1ff42b7d74 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -867,7 +867,12 @@ void Profiler::Engage() {
   if (engaged_) return;
   engaged_ = true;
 
-  OS::LogSharedLibraryAddresses(isolate_);
+  std::vector<OS::SharedLibraryAddress> addresses =
+      OS::GetSharedLibraryAddresses();
+  for (size_t i = 0; i < addresses.size(); ++i) {
+    LOG(isolate_, SharedLibraryEvent(
+        addresses[i].library_path, addresses[i].start, addresses[i].end));
+  }
 
   // Start thread processing the profiler buffer.
   running_ = true;
@@ -1048,26 +1053,13 @@ void Logger::ApiNamedSecurityCheck(Object* key) {
 }
 
 
-void Logger::SharedLibraryEvent(const char* library_path,
+void Logger::SharedLibraryEvent(const std::string& library_path,
                                 uintptr_t start,
                                 uintptr_t end) {
   if (!log_->IsEnabled() || !FLAG_prof) return;
   Log::MessageBuilder msg(log_);
   msg.Append("shared-library,\"%s\",0x%08" V8PRIxPTR ",0x%08" V8PRIxPTR "\n",
-             library_path,
-             start,
-             end);
-  msg.WriteToLogFile();
-}
-
-
-void Logger::SharedLibraryEvent(const wchar_t* library_path,
-                                uintptr_t start,
-                                uintptr_t end) {
-  if (!log_->IsEnabled() || !FLAG_prof) return;
-  Log::MessageBuilder msg(log_);
-  msg.Append("shared-library,\"%ls\",0x%08" V8PRIxPTR ",0x%08" V8PRIxPTR "\n",
-             library_path,
+             library_path.c_str(),
              start,
              end);
   msg.WriteToLogFile();