Use unchecked InputStream methods in the android_webview.

android_webview/java/src/org/chromium/android_webview/InputStreamUtil.java

Index: android_webview/java/src/org/chromium/android_webview/InputStreamUtil.java
diff --git a/android_webview/java/src/org/chromium/android_webview/InputStreamUtil.java b/android_webview/java/src/org/chromium/android_webview/InputStreamUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..d4fb7493d1f726fddbbc5559d58d626a3ed0ca60
--- /dev/null
+++ b/android_webview/java/src/org/chromium/android_webview/InputStreamUtil.java
@@ -0,0 +1,70 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.android_webview;
+
+import android.util.Log;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * Utility methods for calling InputStream methods. These take care of exception handling.
+ */
+@JNINamespace("android_webview")
+class InputStreamUtil {
+    private static final String LOGTAG = "AwAssets";
+    // The InputStream APIs return -1 in some cases. In order to convey the extra information that
+    // the call had failed due to an exception being thrown we simply map all negative return values
+    // from the original calls to -1 and make -2 mean that an exception has been thrown.
+    private static final int CALL_FAILED_STATUS = -1;
+    private static final int EXCEPTION_THROWN_STATUS = -2;
+
+    private static String logMessage(String method) {
+        return "Got exception when calling " + method + "() on an InputStream returned from " +
+            "shouldInterceptRequest. This will cause the related request to fail.";
+    }
+
+    @CalledByNative
+    public static void close(InputStream stream) {
+        try {
+            stream.close();
+        } catch (IOException e) {
+            Log.e(LOGTAG, logMessage("close"), e);
+        }
+    }
+
+    @CalledByNative
+    public static int available(InputStream stream) {
+        try {
+            return Math.max(CALL_FAILED_STATUS, stream.available());
+        } catch (IOException e) {
+            Log.e(LOGTAG, logMessage("available"), e);
+            return EXCEPTION_THROWN_STATUS;
+        }
+    }
+
+    @CalledByNative
+    public static int read(InputStream stream, byte[] b, int off, int len) {
+        try {
+            return Math.max(CALL_FAILED_STATUS, stream.read(b, off, len));
+        } catch (IOException e) {
+            Log.e(LOGTAG, logMessage("read"), e);
+            return EXCEPTION_THROWN_STATUS;
+        }
+    }
+
+    @CalledByNative
+    public static long skip(InputStream stream, long n) {
+        try {
+            return Math.max(CALL_FAILED_STATUS, stream.skip(n));
+        } catch (IOException e) {
+            Log.e(LOGTAG, logMessage("skip"), e);
+            return EXCEPTION_THROWN_STATUS;
+        }
+    }
+}