fuchsia: base_unittests (mostly) compiling

base/message_loop/message_loop.cc

Index: base/message_loop/message_loop.cc
diff --git a/base/message_loop/message_loop.cc b/base/message_loop/message_loop.cc
index 8991ff3a86f4fd7cce39fd4f32c439aed6d7ede3..421a6d26330a926970d1fad8fa298d21f26e8a4c 100644
--- a/base/message_loop/message_loop.cc
+++ b/base/message_loop/message_loop.cc
@@ -46,13 +46,13 @@ MessageLoop::MessagePumpFactory* message_pump_for_ui_factory_ = NULL;
 
 #if defined(OS_IOS)
 typedef MessagePumpIOSForIO MessagePumpForIO;
-#elif defined(OS_NACL_SFI)
+#elif defined(OS_NACL_SFI) || defined(OS_FUCHSIA)
 typedef MessagePumpDefault MessagePumpForIO;
 #elif defined(OS_POSIX)
 typedef MessagePumpLibevent MessagePumpForIO;
 #endif
 
-#if !defined(OS_NACL_SFI)
+#if !defined(OS_NACL_SFI) && !defined(OS_FUCHSIA)
 MessagePumpForIO* ToPumpIO(MessagePump* pump) {
   return static_cast<MessagePumpForIO*>(pump);
 }
@@ -168,7 +168,7 @@ std::unique_ptr<MessagePump> MessageLoop::CreateMessagePumpForType(Type type) {
 
 #if defined(OS_IOS) || defined(OS_MACOSX)
 #define MESSAGE_PUMP_UI std::unique_ptr<MessagePump>(MessagePumpMac::Create())
-#elif defined(OS_NACL) || defined(OS_AIX)
+#elif defined(OS_NACL) || defined(OS_AIX) || defined(OS_FUCHSIA)
 // Currently NaCl doesn't have a UI MessageLoop.

[Nico, 2017/05/17 15:52:53]

Probably want to update this comment. If the expectation is that you'll have an
UI eventually, also add a TODO

[scottmg, 2017/05/17 16:52:51]

Done.

 // TODO(abarth): Figure out if we need this.
 #define MESSAGE_PUMP_UI std::unique_ptr<MessagePump>()
@@ -631,7 +631,7 @@ bool MessageLoopForIO::RegisterJobObject(HANDLE job, IOHandler* handler) {
 bool MessageLoopForIO::WaitForIOCompletion(DWORD timeout, IOHandler* filter) {
   return ToPumpIO(pump_.get())->WaitForIOCompletion(timeout, filter);
 }
-#elif defined(OS_POSIX)
+#elif defined(OS_POSIX) && !defined(OS_FUCHSIA)
 bool MessageLoopForIO::WatchFileDescriptor(int fd,
                                            bool persistent,
                                            Mode mode,