[Mac Fix-It] removed base::mac::AmIForeground function.

base/mac/mac_util.mm

Index: base/mac/mac_util.mm
diff --git a/base/mac/mac_util.mm b/base/mac/mac_util.mm
index d4b584debb78cd9f7a61eda786faa7a11bc2f13a..0d2e7bc38b75adcd5b48357fd826ca73ae04041f 100644
--- a/base/mac/mac_util.mm
+++ b/base/mac/mac_util.mm
@@ -219,23 +219,7 @@ void SwitchFullScreenModes(FullScreenMode from_mode, FullScreenMode to_mode) {
 }
 
 bool AmIForeground() {
-  ProcessSerialNumber foreground_psn = { 0 };
-  OSErr err = GetFrontProcess(&foreground_psn);
-  if (err != noErr) {
-    OSSTATUS_DLOG(WARNING, err) << "GetFrontProcess";
-    return false;
-  }
-
-  ProcessSerialNumber my_psn = { 0, kCurrentProcess };
-
-  Boolean result = FALSE;
-  err = SameProcess(&foreground_psn, &my_psn, &result);
-  if (err != noErr) {
-    OSSTATUS_DLOG(WARNING, err) << "SameProcess";
-    return false;
-  }
-
-  return result;
+  return [[NSApplication sharedApplication] isActive];

[Nico, 2016/10/05 14:19:39]

Is [[NSRunningApplication currentApplication] isActive] maybe better?
[NSApplication sharedApplication] will do things like init Cocoa etc if that
hasn't been done yet, and this is a function in base.

Hm, actually, now that the implementation of this is one line and given that
this has only a single caller, maybe we could just remove this function in base
and then do what it does at the one caller's place directly (and since that's in
chrome, your method is fine there too). WDYT?

[Eugene But (OOO till 7-30), 2016/10/06 00:31:59]

Yeah, that what I asked in the comments (should we just drop AmIForeground) :)
Changed to use [NSRunningApplication currentApplication] and dropped
AmIForeground.

 }
 
 bool SetFileBackupExclusion(const FilePath& file_path) {