Reverting due to Android builders breakage. Subsequent fixes did not fix.

android_webview/java/src/org/chromium/android_webview/AwContentsClient.java

Index: android_webview/java/src/org/chromium/android_webview/AwContentsClient.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContentsClient.java b/android_webview/java/src/org/chromium/android_webview/AwContentsClient.java
index c327c04dfd56b5e402110df6615795cfc8279dc6..b20f521ddc274886a64299ea2d96eb798d53d52d 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContentsClient.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContentsClient.java
@@ -18,7 +18,6 @@ import android.webkit.ValueCallback;
 import android.webkit.WebChromeClient;
 
 import org.chromium.android_webview.permission.AwPermissionRequest;
-import org.chromium.base.annotations.SuppressFBWarnings;
 
 import java.security.Principal;
 import java.util.HashMap;
@@ -77,7 +76,6 @@ public abstract class AwContentsClient {
     /**
      * Parameters for the {@link AwContentsClient#showFileChooser} method.
      */
-    @SuppressFBWarnings("URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
     public static class FileChooserParams {
         public int mode;
         public String acceptTypes;