[Clean up] Delete InstantUnitTestBase::SetUpWithoutCacheableNTP().

Follow up of crrev.com/141893009.

BUG=none
TEST=none

Review URL: https://codereview.chromium.org/164023002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251152 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/search/instant_service_unittest.cc

@@ -36,7 +36,7 @@ class MockInstantServiceObserver : public InstantServiceObserver {
 class InstantServiceTest : public InstantUnitTestBase {
  protected:
   virtual void SetUp() OVERRIDE {
-    InstantUnitTestBase::SetUpWithoutCacheableNTP();
+    InstantUnitTestBase::SetUp();
 
     instant_service_observer_.reset(new MockInstantServiceObserver());
     instant_service_->AddObserver(instant_service_observer_.get());

chrome/browser/search/instant_unittest_base.cc

@@ -37,12 +37,6 @@ void InstantUnitTestBase::SetUp() {
   SetUpHelper();
 }
 
-void InstantUnitTestBase::SetUpWithoutCacheableNTP() {
-  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
-      "InstantExtended", "Group1 use_cacheable_ntp:0"));
-  SetUpHelper();
-}
-
 void InstantUnitTestBase::SetUpHelper() {
   chrome::EnableQueryExtractionForTesting();
   BrowserWithTestWindowTest::SetUp();

chrome/browser/search/instant_unittest_base.h

@@ -25,7 +25,6 @@ class InstantUnitTestBase : public BrowserWithTestWindowTest {
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 
-  virtual void SetUpWithoutCacheableNTP();
   virtual void SetUpHelper();
 
   // Adds and sets the default search provider using the base_url.