Use unchecked InputStream methods in the android_webview.

android_webview/unittestjava/src/org/chromium/android_webview/unittest/InputStreamUnittest.java

Index: android_webview/unittestjava/src/org/chromium/android_webview/unittest/InputStreamUnittest.java
diff --git a/android_webview/unittestjava/src/org/chromium/android_webview/unittest/InputStreamUnittest.java b/android_webview/unittestjava/src/org/chromium/android_webview/unittest/InputStreamUnittest.java
index 761094235d08f80775b1dce7bbbe83b2d7371afb..f6bbaa1bcfaea446278d92f52136ada3c666bc33 100644
--- a/android_webview/unittestjava/src/org/chromium/android_webview/unittest/InputStreamUnittest.java
+++ b/android_webview/unittestjava/src/org/chromium/android_webview/unittest/InputStreamUnittest.java
@@ -6,6 +6,7 @@ package org.chromium.android_webview.unittest;
 
 import org.chromium.base.CalledByNative;
 
+import java.io.IOException;
 import java.io.InputStream;
 
 class InputStreamUnittest {
@@ -23,6 +24,31 @@ class InputStreamUnittest {
     }
 
     @CalledByNative
+    static InputStream getThrowingStream() {
+        return new InputStream() {
+            @Override
+            public int available() throws IOException {
+                throw new IOException();
+            }
+
+            @Override
+            public void close() throws IOException {
+                throw new IOException();
+            }
+
+            @Override
+            public long skip(long n) throws IOException {
+                throw new IOException();
+            }
+
+            @Override
+            public int read() throws IOException {
+                throw new IOException();
+            }
+        };
+    }
+
+    @CalledByNative
     static InputStream getCountingStream(final int size) {
         return new InputStream() {
             private int count = 0;