Fix a bunch of sign mismatch warnings.

core/src/fpdfapi/fpdf_font/fpdf_font.cpp

Index: core/src/fpdfapi/fpdf_font/fpdf_font.cpp
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
index 20c4082d4a6f36ed7792bfa398dd0d8777e5dcc1..2bcdfc7bfdf4b54e8c707d73cd0229820eb6627a 100644
--- a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
+++ b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
@@ -38,7 +38,7 @@ class CFX_StockFontArray {
     FXSYS_memset(m_pStockFonts, 0, sizeof(m_pStockFonts));
   }
   ~CFX_StockFontArray() {
-    for (int i = 0; i < FX_ArraySize(m_pStockFonts); i++) {
+    for (size_t i = 0; i < FX_ArraySize(m_pStockFonts); i++) {
       if (!m_pStockFonts[i])
         continue;
       CPDF_Dictionary* pFontDict = m_pStockFonts[i]->GetFontDict();
@@ -593,7 +593,7 @@ static CFX_WideString _StringToWideString(const CFX_ByteStringC& str) {
   return result;
 }
 void CPDF_ToUnicodeMap::Load(CPDF_Stream* pStream) {
-  int CIDSet = 0;
+  size_t CIDSet = 0;

[Tom Sepez, 2015/09/25 16:06:37]

Shouldn't this be CIDSET_UNKNOW?

   CPDF_StreamAcc stream;
   stream.LoadAllData(pStream, FALSE);
   CPDF_SimpleParser parser(stream.GetData(), stream.GetSize());