Hide fullscreen rotation jank

content/public/common/content_features.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 #include "content/public/common/content_features.h"
 
 namespace features {
 
 // All features in alphabetical order.
@@ skipping 102 matching lines @@
 
 // Causes the implementations of guests (inner WebContents) to use
 // out-of-process iframes.
 const base::Feature kGuestViewCrossProcessFrames{
     "GuestViewCrossProcessFrames", base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables BlinkGC heap compaction.
 const base::Feature kHeapCompaction{"HeapCompaction",
                                      base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enables eviction of janky frames that occur on Android during fullscreen
+// transitions.
+const base::Feature kHideFullscreenTransitionJank{
+    "HideFullscreenTransitionJank", base::FEATURE_ENABLED_BY_DEFAULT};

[mlamouri (slow - plz ping), 2017/07/05 13:55:31]

You might want to make it DISABLED_BY_DEFAULT as I don't think we can launch
this in M61. I think turning it on by default after branch would be a safer
idea. Meanwhile, we can turn it on in Canary/Dev using Finch.

+
 // Enables Blink's idle time spell checker.
 // Design: https://goo.gl/zONC3v
 // Note: The feature is implemented in Blink, and is independent to the
 // ENABLE_SPELLCHECK build flag defined in components/spellcheck.
 const base::Feature kIdleTimeSpellChecking{"IdleTimeSpellChecking",
                                            base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables lazily parsing css properties for performance.
 const base::Feature kLazyParseCSS{"LazyParseCSS",
                                   base::FEATURE_DISABLED_BY_DEFAULT};
@@ skipping 266 matching lines @@
 #endif
 
 #if defined(OS_MACOSX)
 // The V2 sandbox on MacOS removes the unsandboed warmup phase and sandboxes the
 // entire life of the process.
 const base::Feature kMacV2Sandbox{"MacV2Sandbox",
                                   base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_MACOSX)
 
 }  // namespace features