Added completion notification to Profile's ClearNetworkingHistorySince.

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
diff --git a/chrome/test/base/testing_profile.cc b/chrome/test/base/testing_profile.cc
index 63eab1b5640d4241d6d69afacbdde8714495f23d..5682d8010a0588496b779705e2523c74ca890dd4 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -483,6 +483,12 @@ TestingPrefService* TestingProfile::GetTestingPrefService() {
   return testing_prefs_;
 }
 
+void TestingProfile::CreateSkeletonIODataForTesting() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  io_data_.reset(new ProfileImplIOData::Handle(this));
+  io_data_->InitForTesting();
+}
+
 TestingProfile* TestingProfile::AsTestingProfile() {
   return this;
 }
@@ -784,8 +790,11 @@ chrome_browser_net::Predictor* TestingProfile::GetNetworkPredictor() {
   return NULL;
 }
 
-void TestingProfile::ClearNetworkingHistorySince(base::Time time) {
-  NOTIMPLEMENTED();
+void TestingProfile::ClearNetworkingHistorySince(
+    base::Time time,
+    const base::Closure& completion) {
+  DCHECK(io_data_.get());
+  io_data_->ClearNetworkingHistorySince(time, completion);
 }
 
 GURL TestingProfile::GetHomePage() {