Add --disable-compositor-touch-hit-testing flag

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 4e967f6cd8e12740fb0ac080e56e3e9f27d0422b..090238407ea9a6950e2b73db2f03a2c30bd52f2b 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5622,6 +5622,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_DISABLE_TOUCH_ADJUSTMENT_DESCRIPTION" desc="Description of the disable touch adjustment flag.">
         Disables touch adjustment support.  Touch adjustment is the process of refining the position of a touch gesture in order to compensate for touches having poor resolution compared to a mouse.
       </message>
+      <message name="IDS_FLAGS_DISABLE_COMPOSITOR_TOUCH_HIT_TESTING_NAME" desc="Title of the disable compositor touch hit testing flag.">
+        Disable compositor touch hit testing.
+      </message>
+      <message name="IDS_FLAGS_DISABLE_COMPOSITOR_TOUCH_HIT_TESTING_DESCRIPTION" desc="Description of the disable compositor touch hit testing flags.">
+        Disables an optimization intended to improve touch scrolling responsiveness.  Forces all touch events to go to the blink main thread to look for handlers, instead of potentially short-circuiting from the compositor thread.  
+      </message>
       <message name="IDS_ENABLE_BACKLOADER_NAME" desc="Title of the enable background loader flag." >
         Enable background loader component for hosted applications
       </message>