Drop dependency on Isolate* from platform.h

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index 6535d274b0eac80a9446288946eda1ec0649b4bb..4301875b9b61b77e8f4bdf5972e3870b90e99ede 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -125,7 +125,8 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 }
 
 
-void OS::LogSharedLibraryAddresses(Isolate* isolate) {
+std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() {
+  std::vector<SharedLibraryAddress> result;
   unsigned int images_count = _dyld_image_count();
   for (unsigned int i = 0; i < images_count; ++i) {
     const mach_header* header = _dyld_get_image_header(i);
@@ -144,9 +145,10 @@ void OS::LogSharedLibraryAddresses(Isolate* isolate) {
     if (code_ptr == NULL) continue;
     const uintptr_t slide = _dyld_get_image_vmaddr_slide(i);
     const uintptr_t start = reinterpret_cast<uintptr_t>(code_ptr) + slide;
-    LOG(isolate,
-        SharedLibraryEvent(_dyld_get_image_name(i), start, start + size));
+    result.push_back(
+        SharedLibraryAddress(_dyld_get_image_name(i), start, start + size));
   }
+  return result;
 }