[StartSurface] Remove unused context

Bug: 982018
Change-Id: I03d55c949e27870332409111a677bb3170b5549d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1894460
Auto-Submit: Ganggui Tang <gogerald@chromium.org>
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712353}

chrome/android/features/tab_ui/java/src/org/chromium/chrome/browser/tasks/TasksSurfaceCoordinator.java

@@ -41,8 +41,7 @@ public class TasksSurfaceCoordinator implements TasksSurface {
                     activity, mView.getBodyViewContainer());
         }
 
-        mMediator =
-                new TasksSurfaceMediator(activity, propertyModel, fakeboxDelegate, isTabCarousel);
+        mMediator = new TasksSurfaceMediator(propertyModel, fakeboxDelegate, isTabCarousel);
 
         LinearLayout mvTilesLayout = mView.findViewById(R.id.mv_tiles_layout);
         mMostVisitedList = new MostVisitedListCoordinator(activity, mvTilesLayout, propertyModel);

chrome/android/features/tab_ui/java/src/org/chromium/chrome/browser/tasks/TasksSurfaceMediator.java

@@ -11,7 +11,6 @@ import static org.chromium.chrome.browser.tasks.TasksSurfaceProperties.IS_TAB_CA
 import static org.chromium.chrome.browser.tasks.TasksSurfaceProperties.IS_VOICE_RECOGNITION_BUTTON_VISIBLE;
 import static org.chromium.chrome.browser.tasks.TasksSurfaceProperties.VOICE_SEARCH_BUTTON_CLICK_LISTENER;
 
-import android.content.Context;
 import android.support.annotation.Nullable;
 import android.text.Editable;
 import android.text.TextWatcher;
@@ -31,8 +30,8 @@ class TasksSurfaceMediator {
     private final FakeboxDelegate mFakeboxDelegate;
     private final PropertyModel mModel;
 
-    TasksSurfaceMediator(Context context, PropertyModel model, FakeboxDelegate fakeboxDelegate,
-            boolean isTabCarousel) {
+    TasksSurfaceMediator(
+            PropertyModel model, FakeboxDelegate fakeboxDelegate, boolean isTabCarousel) {
         mFakeboxDelegate = fakeboxDelegate;
         assert mFakeboxDelegate != null;