Merge to XFA: Use std::map as CPDF_Dictionary's underlying store.

Merge to XFA: Use std::map as CPDF_Dictionary's underlying store.

Replaces CFX_CMapByteStringToPtr. XFA still uses CFX_CMapByteStringToPtr
so it's not completely removed just yet.

Adds begin()/end() to CPDF_Dictionary and removes the
GetStartPos()/GetNextElement() functions to traverse the dictionary.
Callers are changed accordingly. AddValue() is also removed.

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1541703003 .

(cherry picked from commit 14f39950451bb9c2a11fbc7173fd47367410f80f)

Committed: https://pdfium.googlesource.com/pdfium/+/3f1c71f5a6ea058e3eec611c9dcc759b374dcb80

[Oliver Chang, 2016-01-11 16:42:54]

TBR. clean merge apart from a trivial change in xfa_fontmgr.cpp

[Oliver Chang, 2016-01-11 16:45:40]

Description was changed from

==========
Merge to XFA: Use std::map as CPDF_Dictionary's underlying store.

Replaces CFX_CMapByteStringToPtr. XFA still uses CFX_CMapByteStringToPtr
so it's not completely removed just yet.

Adds begin()/end() to CPDF_Dictionary and removes the
GetStartPos()/GetNextElement() functions to traverse the dictionary.
Callers are changed accordingly. AddValue() is also removed.

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1541703003 .

(cherry picked from commit 14f39950451bb9c2a11fbc7173fd47367410f80f)
==========

to

==========
Merge to XFA: Use std::map as CPDF_Dictionary's underlying store.

Replaces CFX_CMapByteStringToPtr. XFA still uses CFX_CMapByteStringToPtr
so it's not completely removed just yet.

Adds begin()/end() to CPDF_Dictionary and removes the
GetStartPos()/GetNextElement() functions to traverse the dictionary.
Callers are changed accordingly. AddValue() is also removed.

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1541703003 .

(cherry picked from commit 14f39950451bb9c2a11fbc7173fd47367410f80f)

Committed:
https://pdfium.googlesource.com/pdfium/+/3f1c71f5a6ea058e3eec611c9dcc759b374d...
==========

[Oliver Chang, 2016-01-11 16:45:41]

Committed patchset #1 (id:1) manually as
3f1c71f5a6ea058e3eec611c9dcc759b374dcb80 (presubmit successful).