Remove FX_BOOL from core

Review-Url: https://codereview.chromium.org/2477443002
diff --git a/core/fxcodec/codec/fx_codec_png.cpp b/core/fxcodec/codec/fx_codec_png.cpp
index 8630887..0b55a97 100644
--- a/core/fxcodec/codec/fx_codec_png.cpp
+++ b/core/fxcodec/codec/fx_codec_png.cpp
@@ -240,17 +240,17 @@
   }
 }
 
-FX_BOOL CCodec_PngModule::Input(FXPNG_Context* ctx,
-                                const uint8_t* src_buf,
-                                uint32_t src_size,
-                                CFX_DIBAttribute* pAttribute) {
+bool CCodec_PngModule::Input(FXPNG_Context* ctx,
+                             const uint8_t* src_buf,
+                             uint32_t src_size,
+                             CFX_DIBAttribute* pAttribute) {
   if (setjmp(png_jmpbuf(ctx->png_ptr))) {
     if (pAttribute &&
         0 == FXSYS_strcmp(m_szLastError, "Read Header Callback Error")) {
       _png_load_bmp_attribute(ctx->png_ptr, ctx->info_ptr, pAttribute);
     }
-    return FALSE;
+    return false;
   }
   png_process_data(ctx->png_ptr, ctx->info_ptr, (uint8_t*)src_buf, src_size);
-  return TRUE;
+  return true;
 }