Add a way to send the resource percentage signal to the RC.

chrome/browser/page_load_metrics/observers/resource_tracking_page_load_metrics_observer_unittest.cc

 // Copyright 2017 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/page_load_metrics/observers/resource_tracking_page_load_metrics_observer.h"
 
 #include "chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h"
+#include "components/offline_pages/core/background/resource_tracker_observer.h"
+#include "components/offline_pages/core/background/resource_tracker_observer_stub.h"
 
 namespace {
 const char kFakeUrl[] = "http://www.google.com/nothingotseehere.html";
 }  // namespace
 
 namespace page_load_metrics {
 
 class ResourceTrackingPageLoadMetricsObserverTest
     : public page_load_metrics::PageLoadMetricsObserverTestHarness {
  public:
-  ResourceTrackingPageLoadMetricsObserverTest() : observer_(nullptr) {}
+  ResourceTrackingPageLoadMetricsObserverTest()
+      : observer_(nullptr),
+        resource_watcher_(new offline_pages::ResourceTrackerObserverStub) {}
+
+  // FUTURE: If we ever override SetUp, ensure we call the base class SetUp.

[RyanSturm, 2017/05/10 18:30:13]

nit: I don't think this comment is necessary.

[Pete Williamson, 2017/05/10 19:00:52]

Removed (I added it because it cost me a few hours to discover originally).

 
  protected:
   void RegisterObservers(page_load_metrics::PageLoadTracker* tracker) override {
     std::unique_ptr<page_load_metrics::ResourceTrackingPageLoadMetricsObserver>
-        observer(
-            new page_load_metrics::ResourceTrackingPageLoadMetricsObserver());
+        observer(new page_load_metrics::ResourceTrackingPageLoadMetricsObserver(
+            resource_watcher()));
     // Keep track of the observer pointer so we can check it in the unit test.
     observer_ = observer.get();
     tracker->AddObserver(std::move(observer));
   }
 
   page_load_metrics::ResourceTrackingPageLoadMetricsObserver* observer() {
     return observer_;
   }
 
+  offline_pages::ResourceTrackerObserverStub* resource_watcher() {
+    return resource_watcher_;
+  }
+
  private:
   // observer_ is owned by the last created PageLoadTracker, and its lifetime is
   // dictated by that tracker's lifetime.
   page_load_metrics::ResourceTrackingPageLoadMetricsObserver* observer_;
+  offline_pages::ResourceTrackerObserverStub* resource_watcher_;
 };
 
 TEST_F(ResourceTrackingPageLoadMetricsObserverTest, StartAndFinish) {
   page_load_metrics::ExtraRequestStartInfo start_info_1{
       content::ResourceType::RESOURCE_TYPE_IMAGE};
 
   page_load_metrics::ExtraRequestStartInfo start_info_2{
       content::ResourceType::RESOURCE_TYPE_IMAGE};
 
   page_load_metrics::ExtraRequestCompleteInfo done_info{
@@ skipping 15 matching lines @@
   SimulateStartedResource(start_info_2);
   SimulateLoadedResource(done_info);
 
   int64_t started = -1;
   int64_t completed = -1;
   EXPECT_NE(nullptr, observer());
   observer()->GetCountsForTypeForTesting(
       content::ResourceType::RESOURCE_TYPE_IMAGE, &started, &completed);
   EXPECT_EQ(2, started);
   EXPECT_EQ(1, completed);
+  int64_t resource_watcher_started = -1;
+  int64_t resource_watcher_completed = -1;
+  ASSERT_NE(nullptr, resource_watcher());
+  resource_watcher()->GetResourcePercentageCounts(
+      offline_pages::ResourceDataType::IMAGE, &resource_watcher_started,
+      &resource_watcher_completed);
+  EXPECT_EQ(2, resource_watcher_started);
+  EXPECT_EQ(1, resource_watcher_completed);
 }
 
 }  // namespace page_load_metrics