Framework to ascribe all network data use to a source.

chrome/browser/data_use_measurement/chrome_data_use_ascriber.cc

+// Copyright 2016 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/data_use_measurement/chrome_data_use_ascriber.h"
+
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/navigation_handle.h"
+#include "content/public/browser/render_frame_host.h"
+
+namespace data_use_measurement {
+
+ChromeDataUseAscriber::ChromeDataUseAscriber() {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+}
+
+ChromeDataUseAscriber::~ChromeDataUseAscriber() {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+}
+
+DataUseRecorder* ChromeDataUseAscriber::GetDataUseRecorder(
+    const net::URLRequest* request) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+  return nullptr;
+}
+
+void ChromeDataUseAscriber::RenderFrameCreated(int render_process_id,

[Lei Zhang, 2016/09/08 22:04:42]

I haven't looked very hard - why is the implementation empty?

[Not at Google. Contact bengr, 2016/09/09 18:37:16]

Will fill in implementation in subsequent cls. Left it out to keep this cl
reviewable. 

Scope of this cl is to set up a way of propagating these calls from the UI
thread to the IO thread here.

+                                               int render_frame_id,
+                                               int parent_render_process_id,
+                                               int parent_render_frame_id) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+}
+
+void ChromeDataUseAscriber::RenderFrameDeleted(int render_process_id,
+                                               int render_frame_id,
+                                               int parent_render_process_id,
+                                               int parent_render_frame_id) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+}
+
+void ChromeDataUseAscriber::DidStartMainFrameNavigation(
+    GURL gurl,
+    int render_process_id,
+    int render_frame_id,
+    void* navigation_handle) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+}
+
+void ChromeDataUseAscriber::DidFinishMainFrameNavigation(
+    GURL gurl,
+    int render_process_id,
+    int render_frame_id,
+    bool is_same_page_navigation,
+    void* navigation_handle) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+}
+
+void ChromeDataUseAscriber::DidRedirectMainFrameNavigation(
+    GURL gurl,
+    int render_process_id,
+    int render_frame_id,
+    void* navigation_handle) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
+}
+
+}  // namespace data_use_measurement