Remove @MainDex from classes within content/browser

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 78d1e332210721396a4a55e662bcf39ce72be051..7520c065287bf81dc89be94a27689b8bf10492c6 100644
--- a/content/public/android/BUILD.gn
+++ b/content/public/android/BUILD.gn
@@ -50,8 +50,6 @@ android_library("content_java") {
     "//third_party/jsr-305:jsr_305_javalib",
     "//ui/accessibility:ui_accessibility_java",
     "//ui/android:ui_java",
-
-    #"//content:content_common",
   ]
 
   if (enable_webvr) {
@@ -119,7 +117,6 @@ android_library("content_java") {
     "java/src/org/chromium/content/browser/ContextualSearchClient.java",
     "java/src/org/chromium/content/browser/DeviceSensors.java",
     "java/src/org/chromium/content/browser/DeviceUtils.java",
-    "java/src/org/chromium/content/browser/FileDescriptorInfo.java",
     "java/src/org/chromium/content/browser/FloatingWebActionModeCallback.java",
     "java/src/org/chromium/content/browser/InterfaceProvider.java",
     "java/src/org/chromium/content/browser/InterfaceRegistrar.java",
@@ -188,6 +185,7 @@ android_library("content_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/ContentSwitches.java",
+    "java/src/org/chromium/content/common/FileDescriptorInfo.java",
     "java/src/org/chromium/content/common/SurfaceWrapper.java",
     "java/src/org/chromium/content_public/browser/AccessibilitySnapshotCallback.java",
     "java/src/org/chromium/content_public/browser/AccessibilitySnapshotNode.java",