Deleted OS_WIN and all Windows specific files from base.

base/trace_event/memory_dump_manager.cc

Index: base/trace_event/memory_dump_manager.cc
diff --git a/base/trace_event/memory_dump_manager.cc b/base/trace_event/memory_dump_manager.cc
index 15abb91f7a5fe25e54ac87f87c1fc714794f2ad4..94cc3157c9c1d2e958c2c0b81cb051ec9b69b83b 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -27,10 +27,6 @@
 #include "base/trace_event/java_heap_dump_provider_android.h"
 #endif
 
-#if defined(OS_WIN)
-#include "base/trace_event/winheap_dump_provider_win.h"
-#endif
-
 namespace base {
 namespace trace_event {
 
@@ -185,9 +181,6 @@ void MemoryDumpManager::Initialize() {
   RegisterDumpProvider(JavaHeapDumpProvider::GetInstance());
 #endif
 
-#if defined(OS_WIN)
-  RegisterDumpProvider(WinHeapDumpProvider::GetInstance());
-#endif
 }
 
 void MemoryDumpManager::SetDelegate(MemoryDumpManagerDelegate* delegate) {