Added completion notification to Profile's ClearNetworkingHistorySince.

chrome/test/base/testing_profile.h

Index: chrome/test/base/testing_profile.h
diff --git a/chrome/test/base/testing_profile.h b/chrome/test/base/testing_profile.h
index 81e4111e8312cf0c2404e82536e7cab00fd48d23..5cda35a1a5ec7bb28268ed589125894f8c4f1138 100644
--- a/chrome/test/base/testing_profile.h
+++ b/chrome/test/base/testing_profile.h
@@ -13,6 +13,7 @@
 #include "base/timer.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_impl_io_data.h"
 
 namespace content {
 class MockResourceContext;
@@ -176,6 +177,9 @@ class TestingProfile : public Profile {
 
   TestingPrefService* GetTestingPrefService();
 
+  // Initializes a skeleton ProfileIOData instance required for some unit tests.
+  void CreateSkeletonIODataForTesting();
+
   // content::BrowserContext
   virtual FilePath GetPath() OVERRIDE;
   virtual bool IsOffTheRecord() const OVERRIDE;
@@ -294,7 +298,9 @@ class TestingProfile : public Profile {
   void BlockUntilHistoryProcessesPendingRequests();
 
   virtual chrome_browser_net::Predictor* GetNetworkPredictor() OVERRIDE;
-  virtual void ClearNetworkingHistorySince(base::Time time) OVERRIDE;
+  virtual void ClearNetworkingHistorySince(
+      base::Time time,
+      const base::Closure& completion) OVERRIDE;
   virtual GURL GetHomePage() OVERRIDE;
 
   virtual PrefService* GetOffTheRecordPrefs() OVERRIDE;
@@ -353,6 +359,11 @@ class TestingProfile : public Profile {
   // UserCloudPolicyManager returned by GetUserCloudPolicyManager().
   scoped_ptr<policy::UserCloudPolicyManager> user_cloud_policy_manager_;
 
+  // A skeleton ProfileIOData instance, with very limited functionality, needed
+  // for some unit tests.
+  // Initialized on-demand by calling CreateSkeletonIODataForTesting().
+  scoped_ptr<ProfileImplIOData::Handle> io_data_;
+
   // We use a temporary directory to store testing profile data. In a multi-
   // profile environment, this is invalid and the directory is managed by the
   // TestingProfileManager.