[Paint Holding] Rename the flags and feature

The name of Paint Holding has replaced the original name
of AvoidFlashBetweenNavigation. Renaming it allows a forthcoming
finch study to use the current name.

Also update the description etc.

Bug: 1012732
Change-Id: Ia5994207e5d8e8b1f6a136ae709c1c8c773d418d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1849145
Reviewed-by: Peter Boström <[email protected]>
Reviewed-by: Chris Harrelson <[email protected]>
Reviewed-by: Avi Drissman <[email protected]>
Commit-Queue: Stephen Chenney <[email protected]>
Cr-Commit-Position: refs/heads/master@{#704727}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 48e4631..e544add 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -2354,8 +2354,8 @@
 
 #endif  // defined(TOOLKIT_VIEWS) || defined(OS_ANDROID)
 
-extern const char kAvoidFlashBetweenNavigationName[];
-extern const char kAvoidFlahsBetweenNavigationDescription[];
+extern const char kPaintHoldingName[];
+extern const char kPaintHoldingDescription[];
 
 #if defined(WEBRTC_USE_PIPEWIRE)