Change bool type to fix warnings.

fpdfsdk/cfx_systemhandler.cpp

Index: fpdfsdk/cfx_systemhandler.cpp
diff --git a/fpdfsdk/cfx_systemhandler.cpp b/fpdfsdk/cfx_systemhandler.cpp
index 95a940d1ff02c0b41ba6ac9c4c27c5ab94fb5ba9..63b3b0a0b44e5cd40d5358d36384d351643f3e8d 100644
--- a/fpdfsdk/cfx_systemhandler.cpp
+++ b/fpdfsdk/cfx_systemhandler.cpp
@@ -125,18 +125,14 @@ FX_SYSTEMTIME CFX_SystemHandler::GetLocalTime() {
   return m_pEnv->FFI_GetLocalTime();
 }
 
-bool CFX_SystemHandler::IsSHIFTKeyDown(uint32_t nFlag) const {
+FX_BOOL CFX_SystemHandler::IsSHIFTKeyDown(uint32_t nFlag) const {
   return m_pEnv->FFI_IsSHIFTKeyDown(nFlag);

[Tom Sepez, 2016/04/28 16:24:54]

How about keeping the return type as bool, and changing this to
  return !!m_pEnv->FFI_IsShiftKeyDown(nFlag);

[dsinclair, 2016/04/28 17:14:50]

Done.

 }
 
-bool CFX_SystemHandler::IsCTRLKeyDown(uint32_t nFlag) const {
+FX_BOOL CFX_SystemHandler::IsCTRLKeyDown(uint32_t nFlag) const {
   return m_pEnv->FFI_IsCTRLKeyDown(nFlag);
 }
 
-bool CFX_SystemHandler::IsALTKeyDown(uint32_t nFlag) const {
+FX_BOOL CFX_SystemHandler::IsALTKeyDown(uint32_t nFlag) const {
   return m_pEnv->FFI_IsALTKeyDown(nFlag);
 }
-
-bool CFX_SystemHandler::IsINSERTKeyDown(uint32_t nFlag) const {
-  return m_pEnv->FFI_IsINSERTKeyDown(nFlag);
-}