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..2914b1b8df676c6ed975297d1d8961602894ddb9 100644
--- a/base/files/file_util.h
+++ b/base/files/file_util.h
@@ -38,6 +38,7 @@
 namespace base {
 
 class Time;
+class Environment;

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

nit: alphabetical order

[Tom (Use chromium acct), 2016/06/23 21:55:12]

Done.

 
 //-----------------------------------------------------------------------------
 // Functions that involve filesystem access or modification:
@@ -199,6 +200,11 @@ 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.

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

... environment variable in |env|.

[Tom (Use chromium acct), 2016/06/23 21:55:12]

Done.

+BASE_EXPORT bool ExecutableExistsInPath(Environment* env,
+                                        const FilePath::StringType& executable);
+
 #endif  // OS_POSIX
 
 // Returns true if the given directory is empty