Update ActivityLog detection to use previous values, hrefs.

extensions/common/ad_injection_constants.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/common/ad_injection_constants.h"
 
 #include "base/strings/string_util.h"
 
 namespace extensions {
 namespace ad_injection_constants {
 
 namespace keys {
 
 const char kType[] = "type";
 const char kChildren[] = "children";
 const char kSrc[] = "src";
 const char kHref[] = "href";
 
 }  // namespace keys
 
 const char kHtmlIframeSrcApiName[] = "HTMLIFrameElement.src";
 const char kHtmlEmbedSrcApiName[] = "HTMLEmbedElement.src";
+const char kHtmlAnchorHrefApiName[] = "HTMLAnchorElement.href";
 const char kAppendChildApiSuffix[] = "appendChild";
 
 // The maximum number of children to check when we examine a newly-added
 // element.
 extern const size_t kMaximumChildrenToCheck = 10u;
 
 // The maximum depth to check when we examine a newly-added element.
 extern const size_t kMaximumDepthToCheck = 5u;
 
 bool ApiCanInjectAds(const std::string& api) {
   return api == kHtmlIframeSrcApiName ||
          api == kHtmlEmbedSrcApiName ||
+         api == kHtmlAnchorHrefApiName ||
          EndsWith(api, kAppendChildApiSuffix, true /* case sensitive */);
 }
 
 }  // namespace ad_injection_constants
 }  // namespace extensions