Remove @MainDex from classes within content/browser

content/public/android/java/src/org/chromium/content/common/FileDescriptorInfo.java

Index: content/public/android/java/src/org/chromium/content/common/FileDescriptorInfo.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/FileDescriptorInfo.java b/content/public/android/java/src/org/chromium/content/common/FileDescriptorInfo.java
similarity index 87%
rename from content/public/android/java/src/org/chromium/content/browser/FileDescriptorInfo.java
rename to content/public/android/java/src/org/chromium/content/common/FileDescriptorInfo.java
index 7d93c53ee27d9c62560d9326b7d56361d87f2a5a..f14c42c3af765d24c921ca83730989b0ab225eef 100644
--- a/content/public/android/java/src/org/chromium/content/browser/FileDescriptorInfo.java
+++ b/content/public/android/java/src/org/chromium/content/common/FileDescriptorInfo.java
@@ -2,26 +2,28 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-package org.chromium.content.browser;
+package org.chromium.content.common;
 
 import android.os.Parcel;
 import android.os.ParcelFileDescriptor;
 import android.os.Parcelable;
 
 import org.chromium.base.annotations.MainDex;
+import org.chromium.base.annotations.UsedByReflection;
 
 /**
  * Parcelable class that contains file descriptor and file region information to
  * be passed to child processes.
  */
 @MainDex
+@UsedByReflection("child_process_launcher_android.cc")
 public final class FileDescriptorInfo implements Parcelable {
     public final int mId;
     public final ParcelFileDescriptor mFd;
     public final long mOffset;
     public final long mSize;
 
-    FileDescriptorInfo(int id, ParcelFileDescriptor fd, long offset, long size) {
+    public FileDescriptorInfo(int id, ParcelFileDescriptor fd, long offset, long size) {
         mId = id;
         mFd = fd;
         mOffset = offset;