Plumb pinch virtual viewport flag to CC.

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 567114d890957739deddd3dbb6e7e27aa3677b54..f65765f439084a2144f75e69f4ff8a7085d27e1c 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6972,6 +6972,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ENABLE_PINCH_SCALE_DESCRIPTION" desc="Description of the flag to turn on experiental pinch to scale.">
         Enables experimental support for scale using pinch.
       </message>
+      <message name="IDS_FLAGS_ENABLE_PINCH_VIRTUAL_VIEWPORT_NAME" desc="Name of the flag to turn on experimental pinch virtual viewport.">
+        Enable pinch virtual viewport.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_PINCH_VIRTUAL_VIEWPORT_DESCRIPTION" desc="Description of the flag to turn on experimental pinch virtual viewport.">
+        When zoomed in, fixed-position elements and scaled scrollbars attach to this viewport.
+      </message>
       <message name="IDS_FLAGS_NEW_DIALOG_STYLE_NAME" desc="Name of the flag to use the classic or new dialog style.">
         New Dialog Style.
       </message>