Resize only the virtual viewport when the OSK triggers a resize.

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 b8d9e5bcaf2a91e190d8b38236ae4c476b5df086..79a9419f5c76029475f88f3cb4c0a459f900aa5e 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5565,6 +5565,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
         <message name="IDS_FLAGS_DISABLE_WEBAUDIO_DESCRIPTION" desc="Description for the flag to disable WebAudio.">
           Enabling this option prevents web sites from accessing the WebAudio API.
         </message>
+        <message name="IDS_FLAGS_ENABLE_OSK_OVERSCROLL_NAME" desc="Name of about:flags option to turn on the overscrolling for the OSK.">
+          Enable OSK Overscroll
+        </message>
+        <message name="IDS_FLAGS_ENABLE_OSK_OVERSCROLL_DESCRIPTION" desc="Description of about:flags option to turn on overscrolling for the OSK.">
+          Enable OSK overscroll support. With this flag on, the resize events by the OSK will only resize the visible viewport.

[bokan, 2015/10/08 22:38:21]

I would remove "the resize events by" and s/visible/visual. "With this flag on,
the OSK will only resize the visual viewport." sounds more succinct and
technically correct.

[ymalik, 2015/10/09 01:05:25]

Done.

+        </message>
       </if>
       <message name="IDS_FLAGS_COMPOSITING_FOR_FIXED_POSITION_NAME" desc="Name of the 'Compositing for fixed position elements' lab.">
         Compositing for fixed position elements.