flush after every print in windows

R=djsollen@google.com, reed@google.com, epoger@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/26680004

git-svn-id: http://skia.googlecode.com/svn/trunk@11670 2bbb7eff-a529-9590-31e7-b0007b416f81

bench/SkBenchLogger.h

@@ -63,11 +63,10 @@ public:
 private:
 #ifdef SK_BUILD_FOR_ANDROID
     void nativeLogError(const char msg[]) { SkDebugf("%s", msg); }
-    void nativeLogProgress(const char msg[]) { SkDebugf("%s", msg); }
 #else
     void nativeLogError(const char msg[]) { fprintf(stderr, "%s", msg); }
-    void nativeLogProgress(const char msg[]) { printf("%s", msg); }
 #endif
+    void nativeLogProgress(const char msg[]) { SkDebugf("%s", msg); }
 
     void fileWrite(const char msg[], size_t size);
 

gm/gm_expectations.cpp

@@ -34,6 +34,11 @@ namespace skiagm {
         va_start(args, format);
         fprintf(stream, "GM: ");
         vfprintf(stream, format, args);
+#ifdef SK_BUILD_FOR_WIN
+        if (stderr == stream || stdout == stream) {
+            fflush(stream);
+        }
+#endif
         va_end(args);
     }
 

src/ports/SkDebug_win.cpp

@@ -23,6 +23,9 @@ void SkDebugf(const char format[], ...) {
     va_start(args, format);
     vprintf(format, args);
     va_end(args);
+    // When we crash on Windows we often are missing a lot of prints. Since we don't really care
+    // about SkDebugf performance we flush after every print.
+    fflush(stdout);
 
     va_start(args, format);
     vsnprintf(buffer, kBufferSize, format, args);