Move desktop-specific Instant bits to c/b/ui/search.

chrome/browser/instant/instant_tab.cc

-// Copyright 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/instant/instant_tab.h"
-
-InstantTab::InstantTab(InstantPage::Delegate* delegate)
-    : InstantPage(delegate) {
-}
-
-InstantTab::~InstantTab() {
-}
-
-void InstantTab::Init(content::WebContents* contents) {
-  SetContents(contents);
-  DetermineIfPageSupportsInstant();
-}
-
-bool InstantTab::ShouldProcessSetSuggestions() {
-  return true;
-}
-
-bool InstantTab::ShouldProcessFocusOmnibox() {
-  return true;
-}
-
-bool InstantTab::ShouldProcessStartCapturingKeyStrokes() {
-  return true;
-}
-
-bool InstantTab::ShouldProcessStopCapturingKeyStrokes() {
-  return true;
-}
-
-bool InstantTab::ShouldProcessNavigateToURL() {
-  return true;
-}