android: Move CleanupReference to android_webview

content/public/android/BUILD.gn

Index: content/public/android/BUILD.gn
diff --git a/content/public/android/BUILD.gn b/content/public/android/BUILD.gn
index d676476a3d2290ab2350dded33400c717d445d95..ee6ba2e412630b50980a0a049bbba723d837c203 100644
--- a/content/public/android/BUILD.gn
+++ b/content/public/android/BUILD.gn
@@ -193,7 +193,6 @@ android_library("content_java") {
     "java/src/org/chromium/content/browser/input/ThreadedInputConnectionProxyView.java",
     "java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java",
     "java/src/org/chromium/content/browser/webcontents/WebContentsObserverProxy.java",
-    "java/src/org/chromium/content/common/CleanupReference.java",
     "java/src/org/chromium/content/common/ContentSwitches.java",
     "java/src/org/chromium/content/common/SurfaceWrapper.java",
     "java/src/org/chromium/content_public/browser/AccessibilitySnapshotCallback.java",
@@ -386,7 +385,6 @@ android_library("content_javatests") {
     "javatests/src/org/chromium/content/browser/input/TestImeAdapterDelegate.java",
     "javatests/src/org/chromium/content/browser/webcontents/AccessibilitySnapshotTest.java",
     "javatests/src/org/chromium/content/browser/webcontents/WebContentsTest.java",
-    "javatests/src/org/chromium/content/common/CleanupReferenceTest.java",
   ]
 
   data = [