[Offline pages] Stop observing web contents and reset to null after use. Only create a new web cont…

chrome/browser/android/offline_pages/background_loader_offliner_unittest.cc

Index: chrome/browser/android/offline_pages/background_loader_offliner_unittest.cc
diff --git a/chrome/browser/android/offline_pages/background_loader_offliner_unittest.cc b/chrome/browser/android/offline_pages/background_loader_offliner_unittest.cc
index 77dd44d2ba93fffe27d78a92e88418dc30c0adeb..fa2082aa432060ab5ad79f37b160d94a2b4c1eaa 100644
--- a/chrome/browser/android/offline_pages/background_loader_offliner_unittest.cc
+++ b/chrome/browser/android/offline_pages/background_loader_offliner_unittest.cc
@@ -94,10 +94,10 @@ class TestBackgroundLoaderOffliner : public BackgroundLoaderOffliner {
 
   content::WebContents* web_contents() { return stub_->web_contents(); }
 
-  bool is_loading() { return stub_->is_loading(); }
+  bool is_loading() { return loader_ && stub_->is_loading(); }
 
  protected:
-  void ResetState() override;
+  void ResetLoader() override;
 
  private:
   background_loader::BackgroundLoaderContentsStub* stub_;
@@ -111,11 +111,9 @@ TestBackgroundLoaderOffliner::TestBackgroundLoaderOffliner(
 
 TestBackgroundLoaderOffliner::~TestBackgroundLoaderOffliner() {}
 
-void TestBackgroundLoaderOffliner::ResetState() {
-  pending_request_.reset();
+void TestBackgroundLoaderOffliner::ResetLoader() {
   stub_ = new background_loader::BackgroundLoaderContentsStub(browser_context_);
   loader_.reset(stub_);
-  content::WebContentsObserver::Observe(stub_->web_contents());
 }
 
 class BackgroundLoaderOfflinerTest : public testing::Test {