Moved ios popup opening code from Tab to BlockedPopupTabHelper.

ios/web/public/test/fakes/test_web_state_delegate.h

Index: ios/web/public/test/fakes/test_web_state_delegate.h
diff --git a/ios/web/public/test/fakes/test_web_state_delegate.h b/ios/web/public/test/fakes/test_web_state_delegate.h
index 50e98d8b0074e398eb1a94ccbb3b30d2dfbcfac0..dc20ad113b226412d741a422d6fd9277184a1699 100644
--- a/ios/web/public/test/fakes/test_web_state_delegate.h
+++ b/ios/web/public/test/fakes/test_web_state_delegate.h
@@ -15,6 +15,15 @@
 
 namespace web {
 
+// Encapsulates parameters passed to OpenURLFromWebState.
+struct TestOpenURLRequest {
+  TestOpenURLRequest();
+  TestOpenURLRequest(const TestOpenURLRequest&);
+  ~TestOpenURLRequest();
+  WebState* web_state = nullptr;
+  WebState::OpenURLParams params;
+};
+
 // Encapsulates parameters passed to ShowRepostFormWarningDialog.
 struct TestRepostFormRequest {
   TestRepostFormRequest();
@@ -42,6 +51,8 @@ class TestWebStateDelegate : public WebStateDelegate {
   ~TestWebStateDelegate() override;
 
   // WebStateDelegate overrides:
+  WebState* OpenURLFromWebState(WebState*,
+                                const WebState::OpenURLParams&) override;
   JavaScriptDialogPresenter* GetJavaScriptDialogPresenter(WebState*) override;
   bool HandleContextMenu(WebState* source,
                          const ContextMenuParams& params) override;
@@ -59,6 +70,11 @@ class TestWebStateDelegate : public WebStateDelegate {
     return handle_context_menu_called_;
   }
 
+  // Returns the last Open URL request passed to |OpenURLFromWebState|.
+  TestOpenURLRequest* last_open_url_request() const {
+    return last_open_url_request_.get();
+  }
+
   // Returns the last Repost Form request passed to
   // |ShowRepostFormWarningDialog|.
   TestRepostFormRequest* last_repost_form_request() const {
@@ -83,6 +99,7 @@ class TestWebStateDelegate : public WebStateDelegate {
 
  private:
   bool handle_context_menu_called_ = false;
+  std::unique_ptr<TestOpenURLRequest> last_open_url_request_;
   std::unique_ptr<TestRepostFormRequest> last_repost_form_request_;
   bool get_java_script_dialog_presenter_called_ = false;
   TestJavaScriptDialogPresenter java_script_dialog_presenter_;