[TTS] Gather surrounding text on Tap before any UX.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/gesture/SearchGestureHost.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/gesture/SearchGestureHost.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/gesture/SearchGestureHost.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/gesture/SearchGestureHost.java
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index 0000000000000000000000000000000000000000..8a7bba1cc3bfa42d2fdceb2f3628d17b435149bb
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+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/gesture/SearchGestureHost.java
@@ -0,0 +1,25 @@
+// Copyright 2016 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.
+
+package org.chromium.chrome.browser.contextualsearch.gesture;
+
+import org.chromium.content_public.browser.WebContents;
+
+/**
+ * Provides the host interface for Search Gestures, which can create Search Actions.
+ * When a gesture is recognized that it should trigger a search, this interface is used
+ * to communicate back to the host
+ * This is part of the 2016-refactoring (crbug.com/624609, go/cs-refactoring-2016).
+ */
+public interface SearchGestureHost {
+    /**
+     * @return the {@link WebContents} for the current base tab.
+     */
+    WebContents getTabWebContents();
+
+    /**
+     * Tells the host that the current gesture should be dismissed because processing is complete.
+     */
+    void dismissGesture();
+}