Drop dependency on Isolate* from platform.h

src/platform-cygwin.cc

Index: src/platform-cygwin.cc
diff --git a/src/platform-cygwin.cc b/src/platform-cygwin.cc
index 35c65c718245e9fa266ce5d559505b283f937b46..91235cfb0aedcc7656b85d8c253dc3764bd1b309 100644
--- a/src/platform-cygwin.cc
+++ b/src/platform-cygwin.cc
@@ -106,12 +106,13 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 }
 
 
-void OS::LogSharedLibraryAddresses(Isolate* isolate) {
+std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() {
+  std::vector<SharedLibraryAddresses> result;
   // This function assumes that the layout of the file is as follows:
   // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name]
   // If we encounter an unexpected situation we abort scanning further entries.
   FILE* fp = fopen("/proc/self/maps", "r");
-  if (fp == NULL) return;
+  if (fp == NULL) return result;
 
   // Allocate enough room to be able to store a full file name.
   const int kLibNameLen = FILENAME_MAX + 1;
@@ -150,7 +151,7 @@ void OS::LogSharedLibraryAddresses(Isolate* isolate) {
         snprintf(lib_name, kLibNameLen,
                  "%08" V8PRIxPTR "-%08" V8PRIxPTR, start, end);
       }
-      LOG(isolate, SharedLibraryEvent(lib_name, start, end));
+      result.push_back(SharedLibraryAddress(lib_name, start, end));
     } else {
       // Entry not describing executable data. Skip to end of line to set up
       // reading the next entry.
@@ -162,6 +163,7 @@ void OS::LogSharedLibraryAddresses(Isolate* isolate) {
   }
   free(lib_name);
   fclose(fp);
+  return result;
 }