Add base::ExecutableExistsInPath

base/files/file_util.h

Index: base/files/file_util.h
diff --git a/base/files/file_util.h b/base/files/file_util.h
index 8fd9fffeb36d044c6e169fc24f33ccdea0dec732..a64807f51f27a5ab541aec894d362ea0975eb7a7 100644
--- a/base/files/file_util.h
+++ b/base/files/file_util.h
@@ -199,6 +199,10 @@ BASE_EXPORT bool GetPosixFilePermissions(const FilePath& path, int* mode);
 // the permission of a file which the symlink points to.
 BASE_EXPORT bool SetPosixFilePermissions(const FilePath& path, int mode);
 
+// Returns true iff |executable| can be found in any directory specified by the
+// $PATH environment variable.
+BASE_EXPORT bool ExecutableExistsInPath(const char* executable);

[Lei Zhang, 2016/06/21 21:31:21]

Use a StringPiece

[Tom (Use chromium acct), 2016/06/22 16:57:55]

Used FilePath::StringType instead, as this is what the surrounding methods seem
to use.  PLMK if it should still be StringPiece

[Lei Zhang, 2016/06/23 19:17:05]

Ya, that's fine.

+
 #endif  // OS_POSIX
 
 // Returns true if the given directory is empty