Update from https://crrev.com/327068

base/sys_info.h

Index: base/sys_info.h
diff --git a/base/sys_info.h b/base/sys_info.h
index d3476d90e658c4fb8bd6238419501d8faaf9be4c..654d6945a34ba26250356f5b21caa5c8a16f6112 100644
--- a/base/sys_info.h
+++ b/base/sys_info.h
@@ -48,10 +48,6 @@ class BASE_EXPORT SysInfo {
   // or -1 on failure.
   static int64 AmountOfFreeDiskSpace(const FilePath& path);
 
-  // Determine whether the device that services |path| has a seek penalty.
-  // Returns false if it couldn't be determined (e.g., |path| doesn't exist).
-  static bool HasSeekPenalty(const FilePath& path, bool* has_seek_penalty);
-
   // Returns system uptime in milliseconds.
   static int64 Uptime();
 
@@ -98,7 +94,7 @@ class BASE_EXPORT SysInfo {
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Returns the maximum SysV shared memory segment size, or zero if there is no
   // limit.
-  static size_t MaxSharedMemorySize();
+  static uint64 MaxSharedMemorySize();
 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
 
 #if defined(OS_CHROMEOS)