XFA: merge patch from CL 733693003, getting rid of more casts

Getting rid of more (FX_LPCWSTR) casts and fixing two bugs revealed by this.

Since casts to FX_LPCWSTR have been shown to hide bugs I tried removing
more of them, targeting those places where a cast was used to force a
conversion from CFX_WideString to FX_LPCWSTR, replacing these casts with
calls to the newly added .c_str() function. This revealed two places
where the cast was hiding a bug -- where ->c_str() was required instead!

This removes ~33 FX_LPCWSTR casts and there are ~31 left, many of which
will go away in some future change.

Also includes this change:

Removing unnecessary casts from wchar_t* to wchar_t*, by various names.

Original patch from Bruce Dawson(brucedawson@chromium.org)

TBR=bo_xu@foxitsoftware.com, tsepez@chromium.org

Review URL: https://codereview.chromium.org/811593007

1 files changed, 1 insertions, 1 deletions

diff --git a/core/src/fxcrt/fx_basic_bstring.cpp b/core/src/fxcrt/fx_basic_bstring.cpp
index 60153fa45a..c54148d799 100644
--- a/core/src/fxcrt/fx_basic_bstring.cpp
+++ b/core/src/fxcrt/fx_basic_bstring.cpp
@@ -971,7 +971,7 @@ CFX_ByteString CFX_ByteString::FromUnicode(FX_LPCWSTR str, FX_STRSIZE len)
 }
 CFX_ByteString CFX_ByteString::FromUnicode(const CFX_WideString& str)
 {
-    return FromUnicode((FX_LPCWSTR)str, str.GetLength());
+    return FromUnicode(str.c_str(), str.GetLength());
 }
 void CFX_ByteString::ConvertFrom(const CFX_WideString& str, CFX_CharMap* pCharMap)
 {