Remove unneeded controls update in Contextual Search

This patch also removes some plumbing that is no longer used as a
result of removing this update.

Change-Id: I624c0217054ee1954053d715b297a968dddcf43f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2476898Reviewed-by: Donn Denman <donnd@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817703}

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayContentDelegate.java

@@ -88,9 +88,4 @@ public class OverlayContentDelegate {
      * Called once the WebContents has been created and set up completely.
      */
     public void onContentViewCreated() {}
-
-    /**
-     * Called once the WebContents has been destroyed.
-     */
-    public void onContentViewDestroyed() {}
 }

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelContent.java

@@ -416,9 +416,6 @@ public class OverlayPanelContent {
             mShouldReuseWebContents = false;
 
             setVisibility(false);
-
-            // After everything has been disposed, notify the observer.
-            mContentDelegate.onContentViewDestroyed();
         }
     }
 

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

@@ -43,7 +43,6 @@ import org.chromium.chrome.browser.preferences.Pref;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.tab.SadTab;
 import org.chromium.chrome.browser.tab.Tab;
-import org.chromium.chrome.browser.tab.TabBrowserControlsConstraintsHelper;
 import org.chromium.chrome.browser.tab.TabCreationState;
 import org.chromium.chrome.browser.tab.TabLaunchType;
 import org.chromium.chrome.browser.tab.TabSelectionType;
@@ -1068,11 +1067,6 @@ public class ContextualSearchManager
                     getSearchPanelWebContents());
         }
 
-        @Override
-        public void onContentViewDestroyed() {
-            updateTabConstraints();
-        }
-
         @Override
         public void onContentViewSeen() {
             assert mSearchPanel != null;
@@ -1108,14 +1102,6 @@ public class ContextualSearchManager
     // Search Content View
     // ============================================================================================
 
-    /**
-     * Update the state of the browser controls (whether they can be shown or hidden) based on the
-     * current tab.
-     */
-    private void updateTabConstraints() {
-        TabBrowserControlsConstraintsHelper.updateEnabledState(mTabSupplier.get());
-    }
-
     /** Removes the last resolved search URL from the Chrome history. */
     private void removeLastSearchVisit() {
         assert mSearchPanel != null;