Remove ICS support code in chrome/ and components/precache/

components/precache/android/java/src/org/chromium/components/precache/NetworkInfoDelegate.java

Index: components/precache/android/java/src/org/chromium/components/precache/NetworkInfoDelegate.java
diff --git a/components/precache/android/java/src/org/chromium/components/precache/NetworkInfoDelegate.java b/components/precache/android/java/src/org/chromium/components/precache/NetworkInfoDelegate.java
index 17dbf82ec37eab316b4aeb0bb0058800a574dbda..f5abcd536079110f3b61f9d01869962991827767 100644
--- a/components/precache/android/java/src/org/chromium/components/precache/NetworkInfoDelegate.java
+++ b/components/precache/android/java/src/org/chromium/components/precache/NetworkInfoDelegate.java
@@ -7,7 +7,6 @@ package org.chromium.components.precache;
 import android.content.Context;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
-import android.os.Build;
 
 import org.chromium.base.VisibleForTesting;
 
@@ -52,10 +51,6 @@ public class NetworkInfoDelegate {
     }
 
     protected boolean isActiveNetworkMetered() {
-        // ConnectivityManager.isActiveNetworkMetered was added in SDK API 16.
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
-            return false;
-        }
         return mConnectivityManager.isActiveNetworkMetered();
     }
 }