Rename NewTabPagePrefs to RecentTabsPagePrefs.

This class is only used for the RecentTabsPage.

BUG=659631

Review-Url: https://codereview.chromium.org/2612243002
Cr-Commit-Position: refs/heads/master@{#441923}
diff --git a/chrome/android/java_sources.gni b/chrome/android/java_sources.gni
index f26e4e7..527eb13 100644
--- a/chrome/android/java_sources.gni
+++ b/chrome/android/java_sources.gni
@@ -571,7 +571,6 @@
   "java/src/org/chromium/chrome/browser/ntp/NativePageRootFrameLayout.java",
   "java/src/org/chromium/chrome/browser/ntp/NewTabPage.java",
   "java/src/org/chromium/chrome/browser/ntp/NewTabPageLayout.java",
-  "java/src/org/chromium/chrome/browser/ntp/NewTabPagePrefs.java",
   "java/src/org/chromium/chrome/browser/ntp/NewTabPageScrollView.java",
   "java/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java",
   "java/src/org/chromium/chrome/browser/ntp/NewTabPageUma.java",
@@ -580,6 +579,7 @@
   "java/src/org/chromium/chrome/browser/ntp/RecentTabsGroupView.java",
   "java/src/org/chromium/chrome/browser/ntp/RecentTabsManager.java",
   "java/src/org/chromium/chrome/browser/ntp/RecentTabsPage.java",
+  "java/src/org/chromium/chrome/browser/ntp/RecentTabsPagePrefs.java",
   "java/src/org/chromium/chrome/browser/ntp/RecentTabsRowAdapter.java",
   "java/src/org/chromium/chrome/browser/ntp/RecentlyClosedBridge.java",
   "java/src/org/chromium/chrome/browser/ntp/TitleUtil.java",