[ios clean] Updates all BrowserCoordinator to the new rule

ios/shared/chrome/browser/ui/coordinators/browser_coordinator_unittest.mm

Index: ios/shared/chrome/browser/ui/coordinators/browser_coordinator_unittest.mm
diff --git a/ios/shared/chrome/browser/ui/coordinators/browser_coordinator_unittest.mm b/ios/shared/chrome/browser/ui/coordinators/browser_coordinator_unittest.mm
index 2d134580fc963dee0e2ec795c98dae3bc5c312ce..df005e6ebeff8faf3ffec84073390cbc59f37dc6 100644
--- a/ios/shared/chrome/browser/ui/coordinators/browser_coordinator_unittest.mm
+++ b/ios/shared/chrome/browser/ui/coordinators/browser_coordinator_unittest.mm
@@ -5,7 +5,6 @@
 #import "ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h"
 #import "ios/shared/chrome/browser/ui/coordinators/browser_coordinator+internal.h"
 
-#import "ios/shared/chrome/browser/coordinator_context/coordinator_context.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 
@@ -95,13 +94,10 @@ TEST(BrowserCoordinatorTest, TestChildren) {
   [parent addChildCoordinator:child];
   EXPECT_TRUE([parent.children containsObject:child]);
   EXPECT_EQ(parent, child.parentCoordinator);
-  EXPECT_EQ(parent.viewController, child.context.baseViewController);
 
   [parent removeChildCoordinator:child];
   EXPECT_FALSE([parent.children containsObject:child]);
   EXPECT_EQ(nil, child.parentCoordinator);
-  // Unparenting shouldn't change a child's baseViewController.
-  EXPECT_EQ(parent.viewController, child.context.baseViewController);
 
   TestCoordinator* otherParent = [[TestCoordinator alloc] init];
   TestCoordinator* otherChild = [[TestCoordinator alloc] init];