Revert of Refactorise the policy_path_parser framework

Revert of Refactorise the policy_path_parser framework (https://codereview.chromium.org/214233003/)

Reason for revert:
Added a static initializer (policy_path_parser_linux.cc__i686.get_pc_thunk.cx), causing sizes on linux to fail. See http://build.chromium.org/p/chromium/buildstatus?builder=Linux&number=48755 .

Original issue's description:
> Refactorise the policy_path_parser framework
> 
> This CL performs a refactorisation of the policy path parser framework.
> 
> BUG=352627
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=261370

TBR=pastarmovj@chromium.org,kaliamoorthi@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=352627

[bungeman-skia, 2014-04-03 15:00:11]

Created Revert of Refactorise the policy_path_parser framework

[commit-bot: I haz the power, 2014-04-03 15:04:15]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/bungeman@google.com/224023002/1

[commit-bot: I haz the power, 2014-04-03 15:04:37]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-03 15:04:38]

Failed to apply patch for chrome/browser/policy/policy_path_parser.h:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file chrome/browser/policy/policy_path_parser.h
  Hunk #1 FAILED at 7.
  1 out of 1 hunk FAILED -- saving rejects to file
chrome/browser/policy/policy_path_parser.h.rej

Patch:       chrome/browser/policy/policy_path_parser.h
Index: chrome/browser/policy/policy_path_parser.h
diff --git a/chrome/browser/policy/policy_path_parser.h
b/chrome/browser/policy/policy_path_parser.h
index
c0d4c222ce858598269eafd34276ccf13b26ac68..5bf03452f7f98b9418f56ce6b183387d3cfb261c
100644
--- a/chrome/browser/policy/policy_path_parser.h
+++ b/chrome/browser/policy/policy_path_parser.h
@@ -7,30 +7,11 @@
 
 #include <string>
 
-#include "base/bind.h"
 #include "base/files/file_path.h"
 
 namespace policy {
 
 namespace path_parser {
-
-namespace internal {
-
-typedef bool (*GetValueFuncPtr)(base::FilePath::StringType*);
-
-struct VariableNameAndValueCallback {
-  const base::FilePath::CharType* name;
-  const GetValueFuncPtr value_func_ptr;
-};
-
-// Different set of variables are supported in each platform (see below). Hence
-// this table is filled in with different elements in each platform.
-extern const VariableNameAndValueCallback kVariableNameAndValueCallbacks[];
-
-// Since the number of elements in the table could vary for each platform, this
-// variable is used to keep track of it.
-extern const int kNoOfVariables;
-}
 
 // This function is used to expand the variables in policy strings that
 // represent paths. The set of supported variables differs between platforms