Pass CFX_*StringCs to FX_HashCode_GETA and _GETW hash functions.

Too many calls were of the form fn(x.c_str(), x.GetLength())
which is an anti-pattern given the StringC classes which tie
these together.

There are a few places where explicit CFX_*StringCs are
constructed, but this can be avoided by changing the args
to these functions in the same manner.

Removed String_ from name of functions since it added
little value. Also removed default argument.

Review URL: https://codereview.chromium.org/1919563002
diff --git a/fpdfsdk/javascript/global.cpp b/fpdfsdk/javascript/global.cpp
index 380713b..043bd29 100644
--- a/fpdfsdk/javascript/global.cpp
+++ b/fpdfsdk/javascript/global.cpp
@@ -53,7 +53,7 @@
     CHash<'u', 'n', 'd', 'e', 'f', 'i', 'n', 'e', 'd'>::value;
 
 static unsigned JS_CalcHash(const wchar_t* main) {
-  return (unsigned)FX_HashCode_String_GetW(main, FXSYS_wcslen(main));
+  return (unsigned)FX_HashCode_GetW(CFX_WideStringC(main), false);
 }
 
 #ifndef NDEBUG