Replace FTS in the history_service with a brute force text search.

chrome/browser/history/query_parser.h

Index: chrome/browser/history/query_parser.h
diff --git a/chrome/browser/history/query_parser.h b/chrome/browser/history/query_parser.h
index 6bb0787cb6a5481410cff11191cc3d1412782590..c5400ef0670a52369972ff225b74e5ba75a80464 100644
--- a/chrome/browser/history/query_parser.h
+++ b/chrome/browser/history/query_parser.h
@@ -33,6 +33,11 @@ class QueryNode {
   // the number of words in this node.
   virtual int AppendToSQLiteQuery(string16* query) const = 0;
 
+  // Serialize ourselves out to a series of strings which can be passed to
+  // SQLite as REGEXP queries.
+  virtual void AppendSQLiteRegexpQueries(
+      std::vector<string16>* queries) const = 0;
+
   // Return true if this is a QueryNodeWord, false if it's a QueryNodeList.
   virtual bool IsWord() const = 0;
 
@@ -69,6 +74,11 @@ class QueryParser {
   // |sqlite_query| and the number of words is returned.
   int ParseQuery(const string16& query, string16* sqlite_query);
 
+  // Parse a query into a series of SQLite REGEXP queries. The resulting queries
+  // are placed in |sqlite_queries|.
+  void ParseQueryAsRegexps(const string16& query,
+                           std::vector<string16>* sqlite_queries);
+
   // Parses |query|, returning the words that make up it. Any words in quotes
   // are put in |words| without the quotes. For example, the query text
   // "foo bar" results in two entries being added to words, one for foo and one