From 1fb4edaf534c278a0b7a3150efff8e712c1efe91 Mon Sep 17 00:00:00 2001
From: Peng Huang <penghuang@chromium.org>
Date: Tue, 19 Feb 2019 22:01:52 +0000
Subject: [PATCH] Avoid log flooding in GLSurfacePresentationHelper

Bug: 879929
Change-Id: Ifb452736573e65791ed5e3f143778f576854a167
Reviewed-on: https://chromium-review.googlesource.com/c/1477918
Commit-Queue: Peng Huang <penghuang@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633415}
---
 ui/gl/gl_surface_presentation_helper.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ui/gl/gl_surface_presentation_helper.cc b/ui/gl/gl_surface_presentation_helper.cc
index 987725ca1c931..e7bcd1a5b79ff 100644
--- a/ui/gl/gl_surface_presentation_helper.cc
+++ b/ui/gl/gl_surface_presentation_helper.cc
@@ -237,7 +237,13 @@ void GLSurfacePresentationHelper::CheckPendingFrames() {
                                                         &vsync_interval_)) {
       vsync_timebase_ = base::TimeTicks();
       vsync_interval_ = base::TimeDelta();
-      LOG(ERROR) << "GetVSyncParametersIfAvailable() failed!";
+      static unsigned int count = 0;
+      ++count;
+      // GetVSyncParametersIfAvailable() could be called and failed frequently,
+      // so we have to limit the LOG to avoid flooding the log.
+      LOG_IF(ERROR, count < 20 || !(count & 0xff))
+          << "GetVSyncParametersIfAvailable() failed for " << count
+          << " times!";
     }
   }