posix: move mac-specific code into mac-specific file

base/sys_info_posix.cc

Index: base/sys_info_posix.cc
diff --git a/base/sys_info_posix.cc b/base/sys_info_posix.cc
index 41afff2089e2b6385f6a292c5b09947a3df331e7..ace495e8e86b5c6f4f39bc1a8af9c2d282ad6b58 100644
--- a/base/sys_info_posix.cc
+++ b/base/sys_info_posix.cc
@@ -10,12 +10,6 @@
 #include <sys/utsname.h>
 #include <unistd.h>
 
-#if defined(OS_MACOSX)
-#include <ApplicationServices/ApplicationServices.h>
-#include <mach/mach_host.h>
-#include <mach/mach_init.h>
-#endif
-
 #if defined(OS_OPENBSD)
 #include <sys/param.h>
 #include <sys/sysctl.h>
@@ -53,23 +47,9 @@ int SysInfo::NumberOfProcessors() {
 
 // static
 int64 SysInfo::AmountOfPhysicalMemory() {
+#if defined(OS_FREEBSD)
   // _SC_PHYS_PAGES is not part of POSIX and not available on OS X or
   // FreeBSD
-#if defined(OS_MACOSX)
-  struct host_basic_info hostinfo;
-  mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
-  int result = host_info(mach_host_self(),
-                         HOST_BASIC_INFO,
-                         reinterpret_cast<host_info_t>(&hostinfo),
-                         &count);
-  DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
-  if (result != KERN_SUCCESS) {
-    NOTREACHED();
-    return 0;
-  }
-
-  return static_cast<int64>(hostinfo.max_mem);
-#elif defined(OS_FREEBSD)
   // TODO(benl): I have no idea how to get this
   NOTIMPLEMENTED();
   return 0;
@@ -143,61 +123,19 @@ std::string SysInfo::CPUArchitecture() {
 
 // static
 void SysInfo::GetPrimaryDisplayDimensions(int* width, int* height) {
-#if defined(OS_MACOSX)
-  CGDirectDisplayID main_display = CGMainDisplayID();
-  if (width)
-    *width = CGDisplayPixelsWide(main_display);
-  if (height)
-    *height = CGDisplayPixelsHigh(main_display);
-#else
   // TODO(port): http://crbug.com/21732
   NOTIMPLEMENTED();
   if (width)
     *width = 0;
   if (height)
     *height = 0;
-#endif
 }
 
 // static
 int SysInfo::DisplayCount() {
-#if defined(OS_MACOSX)
-  // Don't just return the number of online displays.  It includes displays
-  // that mirror other displays, which are not desired in the count.  It's
-  // tempting to use the count returned by CGGetActiveDisplayList, but active
-  // displays exclude sleeping displays, and those are desired in the count.
-
-  // It would be ridiculous to have this many displays connected, but
-  // CGDirectDisplayID is just an integer, so supporting up to this many
-  // doesn't hurt.
-  CGDirectDisplayID online_displays[128];
-  CGDisplayCount online_display_count = 0;
-  if (CGGetOnlineDisplayList(arraysize(online_displays),
-                             online_displays,
-                             &online_display_count) != kCGErrorSuccess) {
-    // 1 is a reasonable assumption.
-    return 1;
-  }
-
-  int display_count = 0;
-  for (CGDisplayCount online_display_index = 0;
-       online_display_index < online_display_count;
-       ++online_display_index) {
-    CGDirectDisplayID online_display = online_displays[online_display_index];
-    if (CGDisplayMirrorsDisplay(online_display) == kCGNullDirectDisplay) {
-      // If this display doesn't mirror any other, include it in the count.
-      // The primary display in a mirrored set will be counted, but those that
-      // mirror it will not be.
-      ++display_count;
-    }
-  }
-
-  return display_count;
-#else
   // TODO(port): http://crbug.com/21732
   NOTIMPLEMENTED();
   return 1;
-#endif
 }
 
 // static