Add a new flag for slimming paint invalidation

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 3b5aa6ea4a5f212514f38e644c29f6646666c4bd..fd995363b38ac054214d1adedd08eab829b9076b 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6014,6 +6014,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_GPU_RASTERIZATION_MSAA_SAMPLE_COUNT_SIXTEEN" desc="">
         16
       </message>
+      <message name="IDS_FLAGS_ENABLE_SLIMMING_PAINT_INVALIDATION_NAME" desc="Title for about:flags option to enable slimming paint invalidation.">
+        Enable slimming paint invalidation.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_SLIMMING_PAINT_INVALIDATION_DESCRIPTION" desc="Description of about:flags option for enabling slimming paint invalidation.">
+        Enable a new paint invalidation system.
+      </message>
       <message name="IDS_FLAGS_EXPERIMENTAL_SECURITY_FEATURES_NAME" desc="Name for the flag to enable experimental security features.">
         Potentially annoying security features
       </message>