Bug 1590933 - Add MOZ_LOG support to CrossProcessPaint. r=jya

Differential Revision: https://phabricator.services.mozilla.com/D51036

--HG--
extra : moz-landing-system : lando

gfx/ipc/CrossProcessPaint.cpp

@@ -15,6 +15,7 @@
 #include "mozilla/dom/WindowGlobalActorsBinding.h"
 #include "mozilla/gfx/DrawEventRecorder.h"
 #include "mozilla/gfx/InlineTranslator.h"
+#include "mozilla/Logging.h"
 #include "mozilla/PresShell.h"
 
 #include "gfxPlatform.h"
@@ -24,16 +25,13 @@
 #include "nsIDocShell.h"
 #include "nsPresContext.h"
 
-#define ENABLE_PAINT_LOG 0
-// #define ENABLE_PAINT_LOG 1
+static mozilla::LazyLogModule gCrossProcessPaintLog("CrossProcessPaint");
+static mozilla::LazyLogModule gPaintFragmentLog("PaintFragment");
 
-#if ENABLE_PAINT_LOG
-#  define PF_LOG(...) printf_stderr("PaintFragment: " __VA_ARGS__)
-#  define CPP_LOG(...) printf_stderr("CrossProcessPaint: " __VA_ARGS__)
-#else
-#  define PF_LOG(...)
-#  define CPP_LOG(...)
-#endif
+#define CPP_LOG(msg, ...) \
+  MOZ_LOG(gCrossProcessPaintLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
+#define PF_LOG(msg, ...) \
+  MOZ_LOG(gPaintFragmentLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
 
 namespace mozilla {
 namespace gfx {