Plumb smooth scrolling in Chromium compositor

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index eda9e4eb86afab951fb9cbae9f9c1454e52c55d9..94af5a386dd9a82d2029216b2d454824caf53c9e 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1341,6 +1341,7 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(InputMsg_MoveCaret, OnMoveCaret)
     IPC_MESSAGE_HANDLER(InputMsg_ScrollFocusedEditableNodeIntoRect,
                         OnScrollFocusedEditableNodeIntoRect)
+    IPC_MESSAGE_HANDLER(InputMsg_SmoothScroll, OnSmoothScroll)
     IPC_MESSAGE_HANDLER(InputMsg_SetEditCommandsForNextKeyEvent,
                         OnSetEditCommandsForNextKeyEvent)
     IPC_MESSAGE_HANDLER(ViewMsg_CopyImageAt, OnCopyImageAt)
@@ -1491,6 +1492,14 @@ void RenderViewImpl::OnScrollFocusedEditableNodeIntoRect(
     FocusChangeComplete();
 }
 
+void RenderViewImpl::OnSmoothScroll(int target_x,
+                                    int target_y,
+                                    long duration_ms) {
+  if (!webview())
+    return;
+  webview()->smoothScroll(target_x, target_y, duration_ms);
+}
+
 void RenderViewImpl::OnSetEditCommandsForNextKeyEvent(
     const EditCommands& edit_commands) {
   edit_commands_ = edit_commands;