Android: Use a ResourceThrottle to intercept GET downloads.

chrome/browser/android/intercept_download_resource_throttle.cc

Index: chrome/browser/android/intercept_download_resource_throttle.cc
diff --git a/chrome/browser/android/intercept_download_resource_throttle.cc b/chrome/browser/android/intercept_download_resource_throttle.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8f718908c668d2bd4c02bf2da92241d8eea19e74
--- /dev/null
+++ b/chrome/browser/android/intercept_download_resource_throttle.cc
@@ -0,0 +1,45 @@
+// 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 "chrome/browser/android/intercept_download_resource_throttle.h"
+
+#include "content/public/browser/android/download_controller_android.h"
+#include "content/public/browser/resource_controller.h"
+#include "net/http/http_request_headers.h"
+#include "net/url_request/url_request.h"
+
+namespace chrome {
+
+InterceptDownloadResourceThrottle::InterceptDownloadResourceThrottle(
+    net::URLRequest* request,
+    int render_process_id,
+    int render_view_id,
+    int request_id)
+    : request_(request),
+      render_process_id_(render_process_id),
+      render_view_id_(render_view_id),
+      request_id_(request_id) {
+}
+
+InterceptDownloadResourceThrottle::~InterceptDownloadResourceThrottle() {
+}
+
+void InterceptDownloadResourceThrottle::WillStartRequest(bool* defer) {
+  ProcessDownloadRequest();
+}
+
+void InterceptDownloadResourceThrottle::WillProcessResponse(bool* defer) {
+  ProcessDownloadRequest();
+}
+
+void InterceptDownloadResourceThrottle::ProcessDownloadRequest() {
+  if (request_->method() != net::HttpRequestHeaders::kGetMethod)

[asanka, 2013/04/05 16:57:35]

What if the scheme isn't http or https?

+    return;
+
+  content::DownloadControllerAndroid::Get()->CreateGETDownload(
+      render_process_id_, render_view_id_, request_id_);
+  controller()->Cancel();
+}
+
+}  // namespace