Revert of Add a NavigationThrottle to the public content/ interface

components/navigation_interception/intercept_navigation_resource_throttle.cc

Index: components/navigation_interception/intercept_navigation_resource_throttle.cc
diff --git a/components/navigation_interception/intercept_navigation_resource_throttle.cc b/components/navigation_interception/intercept_navigation_resource_throttle.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1b0b89f43d396926c777878c2cf92179ed2e61e6
--- /dev/null
+++ b/components/navigation_interception/intercept_navigation_resource_throttle.cc
@@ -0,0 +1,146 @@
+// 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 "components/navigation_interception/intercept_navigation_resource_throttle.h"
+
+#include "components/navigation_interception/navigation_params.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/child_process_security_policy.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/resource_context.h"
+#include "content/public/browser/resource_controller.h"
+#include "content/public/browser/resource_request_info.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/referrer.h"
+#include "net/http/http_response_headers.h"
+#include "net/url_request/redirect_info.h"
+#include "net/url_request/url_request_context.h"
+#include "net/url_request/url_request_job_factory.h"
+#include "net/url_request/url_request.h"
+#include "ui/base/page_transition_types.h"
+
+using content::BrowserThread;
+using content::ChildProcessSecurityPolicy;
+using ui::PageTransition;
+using content::Referrer;
+using content::RenderProcessHost;
+using content::ResourceRequestInfo;
+
+namespace navigation_interception {
+
+namespace {
+
+void CheckIfShouldIgnoreNavigationOnUIThread(
+    int render_process_id,
+    int render_frame_id,
+    const NavigationParams& navigation_params,
+    InterceptNavigationResourceThrottle::CheckOnUIThreadCallback
+    should_ignore_callback,
+    base::Callback<void(bool)> callback) {
+  bool should_ignore_navigation = false;
+  RenderProcessHost* rph = RenderProcessHost::FromID(render_process_id);
+  if (rph) {
+    NavigationParams validated_params(navigation_params);
+    rph->FilterURL(false, &validated_params.url());
+
+    content::RenderFrameHost* render_frame_host =
+        content::RenderFrameHost::FromID(render_process_id, render_frame_id);
+    content::WebContents* web_contents =
+        content::WebContents::FromRenderFrameHost(render_frame_host);
+
+    if (web_contents) {
+      should_ignore_navigation = should_ignore_callback.Run(web_contents,
+                                                            validated_params);
+    }
+  }
+
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(callback, should_ignore_navigation));
+}
+
+} // namespace
+
+InterceptNavigationResourceThrottle::InterceptNavigationResourceThrottle(
+    net::URLRequest* request,
+    CheckOnUIThreadCallback should_ignore_callback)
+    : request_(request),
+      should_ignore_callback_(should_ignore_callback),
+      weak_ptr_factory_(this) {
+}
+
+InterceptNavigationResourceThrottle::~InterceptNavigationResourceThrottle() {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+}
+
+void InterceptNavigationResourceThrottle::WillStartRequest(bool* defer) {
+  *defer =
+      CheckIfShouldIgnoreNavigation(request_->url(), request_->method(), false);
+}
+
+void InterceptNavigationResourceThrottle::WillRedirectRequest(
+    const net::RedirectInfo& redirect_info,
+    bool* defer) {
+  *defer = CheckIfShouldIgnoreNavigation(redirect_info.new_url,
+                                         redirect_info.new_method, true);
+}
+
+const char* InterceptNavigationResourceThrottle::GetNameForLogging() const {
+  return "InterceptNavigationResourceThrottle";
+}
+
+bool InterceptNavigationResourceThrottle::CheckIfShouldIgnoreNavigation(
+    const GURL& url,
+    const std::string& method,
+    bool is_redirect) {
+  const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request_);
+  if (!info)
+    return false;
+
+  int render_process_id, render_frame_id;
+  if (!info->GetAssociatedRenderFrame(&render_process_id, &render_frame_id))
+    return false;
+
+  bool is_external_protocol =
+      !info->GetContext()->GetRequestContext()->job_factory()->IsHandledURL(
+          url);
+  NavigationParams navigation_params(
+      url,
+      Referrer::SanitizeForRequest(
+          url, Referrer(GURL(request_->referrer()), info->GetReferrerPolicy())),
+      info->HasUserGesture(), method == "POST", info->GetPageTransition(),
+      is_redirect, is_external_protocol, true);
+
+  BrowserThread::PostTask(
+      BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(
+          &CheckIfShouldIgnoreNavigationOnUIThread,
+          render_process_id,
+          render_frame_id,
+          navigation_params,
+          should_ignore_callback_,
+          base::Bind(
+              &InterceptNavigationResourceThrottle::OnResultObtained,
+              weak_ptr_factory_.GetWeakPtr())));
+
+  // Defer request while we wait for the UI thread to check if the navigation
+  // should be ignored.
+  return true;
+}
+
+void InterceptNavigationResourceThrottle::OnResultObtained(
+    bool should_ignore_navigation) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  if (should_ignore_navigation) {
+    controller()->CancelAndIgnore();
+  } else {
+    controller()->Resume();
+  }
+}
+
+}  // namespace navigation_interception