Add an experimental search widget

chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchLocationBarLayout.java

Index: chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchLocationBarLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchLocationBarLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchLocationBarLayout.java
new file mode 100644
index 0000000000000000000000000000000000000000..6cf4865707d90f6716ea3b55a5b4cc239320f3b3
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchLocationBarLayout.java
@@ -0,0 +1,59 @@
+// Copyright 2017 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.searchwidget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.omnibox.LocationBarLayout;
+
+/** Implementation of the {@link LocationBarLayout} that is displayed for widget searches. */
+class SearchLocationBarLayout extends LocationBarLayout {
+    /** Delegates calls out to the containing Activity. */
+    public static interface Delegate {
+        /** Load a URL in the associated tab. */
+        void loadUrl(String url);
+
+        /** The user hit the back button. */
+        void backKeyPressed();
+    }
+
+    private Delegate mDelegate;
+
+    public SearchLocationBarLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        findViewById(R.id.google_g_container).setVisibility(View.GONE);
+
+        // TODO(dfalcantara|yusufo): Remove once upstream and the bar is inflated from XML.
+        onFinishInflate();
+    }
+
+    /** Set the {@link Delegate}. */
+    void setDelegate(Delegate delegate) {
+        mDelegate = delegate;
+    }
+
+    @Override
+    protected void loadUrl(String url, int transition) {
+        mDelegate.loadUrl(url);
+    }
+
+    @Override
+    protected void backKeyPressed() {
+        mDelegate.backKeyPressed();
+    }
+
+    @Override
+    public boolean mustQueryUrlBarLocationForSuggestions() {
+        return true;
+    }
+
+    @Override
+    public void setUrlToPageUrl() {
+        // Explicitly do nothing.  The tab is invisible, so showing its URL would be confusing.
+    }
+}