Replace HistoryQuickProvider protobuf-based caching with an SQLite-based database.

chrome/test/base/testing_profile.h

Index: chrome/test/base/testing_profile.h
===================================================================
--- chrome/test/base/testing_profile.h	(revision 151481)
+++ chrome/test/base/testing_profile.h	(working copy)
@@ -38,6 +38,7 @@
 class CommandLine;
 class ExtensionSpecialStoragePolicy;
 class FaviconService;
+class HistoryService;
 class HostContentSettingsMap;
 class PrefService;
 class ProfileDependencyManager;
@@ -140,6 +141,12 @@
   // for testing error conditions.
   void CreateHistoryService(bool delete_file, bool no_db);
 
+  // Initializes the history service. If |no_db| is true, the history backend
+  // will fail to initialize its database; this is useful for testing error
+  // conditions. Returns true upon success.
+  virtual bool InitHistoryService(HistoryService* history_service,
+                                  bool no_db);
+
   // Shuts down and nulls out the reference to HistoryService.
   void DestroyHistoryService();