Remove unused Contextual Search methods.

BUG=406483

Review URL: https://codereview.chromium.org/1146453003

Cr-Commit-Position: refs/heads/master@{#330676}

chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/Layout.java

@@ -19,7 +19,6 @@ import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.SuppressFBWarnings;
 import org.chromium.chrome.browser.Tab;
 import org.chromium.chrome.browser.compositor.LayerTitleCache;
-import org.chromium.chrome.browser.compositor.bottombar.contextualsearch.ContextualSearchPanel;
 import org.chromium.chrome.browser.compositor.layouts.ChromeAnimation.Animatable;
 import org.chromium.chrome.browser.compositor.layouts.ChromeAnimation.Animation;
 import org.chromium.chrome.browser.compositor.layouts.components.LayoutTab;
@@ -635,23 +634,6 @@ public abstract class Layout implements TabContentManager.ThumbnailChangeListene
         return false;
     }
 
-    /**
-     * Returns whether or not the native Contextual Search layout is showing. Layouts supporting
-     * Contextual Search should override this method and return "true", indicating that
-     * the layout has already been swapped from an Android View to a native cc::Layer.
-     * @return Whether or not the Contextual Search bar is showing.
-     */
-    public boolean isContextualSearchLayoutShowing() {
-        return false;
-    }
-
-    /**
-     * @return The {@link ContextualSearchPanel} or "null" if there is none for this layout.
-     */
-    public ContextualSearchPanel getContextualSearchPanel() {
-        return null;
-    }
-
     /**
      * @param currentOffset The current top controls offset in dp.
      * @return {@link Float#NaN} if no offset should be used, or a value in dp if the top controls

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagementDelegate.java

@@ -30,11 +30,6 @@ public interface ContextualSearchManagementDelegate {
      */
     void logPromoOutcome();
 
-    /**
-     * @return Whether or not the Contextual Search Bar is peeking.
-     */
-    boolean isSearchBarPeeking();
-
     /**
      * Updates the top controls state for the base tab.  As these values are set at the renderer
      * level, there is potential for this impacting other tabs that might share the same