Refactoring how conditions without URL attributes are handled.

chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h

Index: chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h
diff --git a/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h b/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h
index 922dba7f111ffdc12352c2e06703c3fa828e3197..46c9e437d40df546833f84be0bbb396c409da532 100644
--- a/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h
+++ b/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_CONDITION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_CONDITION_H_
 
+#include <set>
 #include <string>
 #include <vector>
 
@@ -47,15 +48,17 @@ class WebRequestCondition {
       const base::Value& condition,
       std::string* error);
 
-  // Returns whether the request is a match, given that the URLMatcher found
-  // a match for |url_matcher_conditions_|.
-  bool IsFulfilled(const WebRequestRule::RequestData& request_data) const;
+  // Returns whether the request matches this condition.  |url_matches| lists
+  // the IDs that match the request's URL.
+  bool IsFulfilled(const std::set<URLMatcherConditionSet::ID>& url_matches,
+                   const WebRequestRule::RequestData& request_data) const;
 
   // Returns a URLMatcherConditionSet::ID which is the canonical representation
   // for all URL patterns that need to be matched by this WebRequestCondition.
   // This ID is registered in a URLMatcher that can inform us in case of a
   // match.
   URLMatcherConditionSet::ID url_matcher_condition_set_id() const {
+    DCHECK(url_matcher_conditions_.get());
     return url_matcher_conditions_->id();
   }
 
@@ -78,7 +81,11 @@ class WebRequestCondition {
   int stages() const { return applicable_request_stages_; }
 
  private:
+  // Represents the 'url' attribute of this condition. If NULL then there was no
+  // 'url' attribute in this condition.
   scoped_refptr<URLMatcherConditionSet> url_matcher_conditions_;
+
+  // All non-UrlFilter attributes of this condition.
   WebRequestConditionAttributes condition_attributes_;
 
   // Bit vector indicating all RequestStage during which all
@@ -111,25 +118,25 @@ class WebRequestConditionSet {
     return conditions_;
   }
 
-  // Returns whether any condition in the condition set is fulfilled
-  // based on a match |url_match| and the value of |request_data.request|.
-  // This function should be called for each URLMatcherConditionSet::ID
-  // that was found by the URLMatcher to ensure that the each trigger in
-  // |match_triggers_| is found.
+  // Returns whether any condition in the condition set is fulfilled. Filters
+  // out conditions which have UrlFilter attributes but are not listed in
+  // |url_matches|, and tests the rest against |request_data.request|.
   bool IsFulfilled(
-      URLMatcherConditionSet::ID url_match,
+      const std::set<URLMatcherConditionSet::ID>& url_matches,
       const WebRequestRule::RequestData& request_data) const;
 
   // Appends the URLMatcherConditionSet from all conditions to |condition_sets|.
   void GetURLMatcherConditionSets(
       URLMatcherConditionSet::Vector* condition_sets) const;
 
- private:
-  Conditions conditions_;
+  // Returns whether there are some conditions without UrlFilter attributes.
+  bool has_conditions_without_urls() const {
+    return has_conditions_without_urls_;
+  }
 
-  typedef std::map<URLMatcherConditionSet::ID, WebRequestCondition*>
-      MatchTriggers;
-  MatchTriggers match_triggers_;
+ private:
+  const Conditions conditions_;
+  const bool has_conditions_without_urls_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRequestConditionSet);
 };