Do not use CalledByNativeUnchecked

android_webview/native/android_protocol_handler.cc

 // Copyright (c) 2012 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.
 
 #include "android_webview/native/android_protocol_handler.h"
 
 #include "android_webview/browser/net/android_stream_reader_url_request_job.h"
 #include "android_webview/browser/net/aw_url_request_job_factory.h"
 #include "android_webview/common/url_constants.h"
 #include "android_webview/native/input_stream_impl.h"
@@ skipping 128 matching lines @@
 
   // Open the input stream.
   ScopedJavaLocalRef<jstring> jurl =
       ConvertUTF8ToJavaString(env, url.spec());
   ScopedJavaLocalRef<jobject> stream =
       android_webview::Java_AndroidProtocolHandler_open(
           env,
           GetResourceContext(env).obj(),
           jurl.obj());
 
-  // Check and clear pending exceptions.
-  if (ClearException(env) || stream.is_null()) {
+  if (stream.is_null()) {
     DLOG(ERROR) << "Unable to open input stream for Android URL";
     return scoped_ptr<InputStream>();
   }
   return make_scoped_ptr<InputStream>(new InputStreamImpl(stream));
 }
 
 void AndroidStreamReaderURLRequestJobDelegateImpl::OnInputStreamOpenFailed(
     net::URLRequest* request,
     bool* restart) {
   DCHECK(!HasRequestPreviouslyFailed(request));
@@ skipping 14 matching lines @@
   // fail, as the mime type cannot be determined for all supported schemes.
   ScopedJavaLocalRef<jstring> url =
       ConvertUTF8ToJavaString(env, request->url().spec());
   const InputStreamImpl* stream_impl =
       InputStreamImpl::FromInputStream(stream);
   ScopedJavaLocalRef<jstring> returned_type =
       android_webview::Java_AndroidProtocolHandler_getMimeType(
           env,
           GetResourceContext(env).obj(),
           stream_impl->jobj(), url.obj());
-  if (ClearException(env) || returned_type.is_null())
+  if (returned_type.is_null())
     return false;
 
   *mime_type = base::android::ConvertJavaStringToUTF8(returned_type);
   return true;
 }
 
 bool AndroidStreamReaderURLRequestJobDelegateImpl::GetCharset(
     JNIEnv* env,
     net::URLRequest* request,
     android_webview::InputStream* stream,
@@ skipping 112 matching lines @@
       env, android_webview::kAndroidAssetPath).Release();
 }
 
 static jstring GetAndroidResourcePath(JNIEnv* env, jclass /*clazz*/) {
   // OK to release, JNI binding.
   return ConvertUTF8ToJavaString(
       env, android_webview::kAndroidResourcePath).Release();
 }
 
 }  // namespace android_webview