Remove unnecessary includes from shortcut_helper.cc

Bug: 1147291
Change-Id: I04705c3aa57a0fa8cf7069b63b797c8882f7f277
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2530322Reviewed-by: Dominick Ng <dominickn@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826286}

chrome/browser/android/shortcut_helper.cc

@@ -21,11 +21,7 @@
 #include "base/threading/thread_restrictions.h"
 #include "chrome/android/chrome_jni_headers/ShortcutHelper_jni.h"
 #include "chrome/browser/android/color_helpers.h"
-#include "chrome/browser/android/tab_android.h"
-#include "chrome/browser/android/webapk/webapk_install_service.h"
-#include "chrome/browser/android/webapk/webapk_metrics.h"
 #include "chrome/browser/flags/android/chrome_feature_list.h"
-#include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/manifest_icon_downloader.h"
 #include "content/public/browser/web_contents.h"