Avoid parsing the webstore base url so much.

extensions/common/extension_urls.cc

Index: extensions/common/extension_urls.cc
diff --git a/extensions/common/extension_urls.cc b/extensions/common/extension_urls.cc
index 0235621c76fe9a981de848c4470b72d9696e4b05..2cddc33c5370cabaefab3302e1c9801797d54dd4 100644
--- a/extensions/common/extension_urls.cc
+++ b/extensions/common/extension_urls.cc
@@ -33,35 +33,40 @@ const char kChromeWebstoreBaseURL[] = "https://chrome.google.com/webstore";
 const char kChromeWebstoreUpdateURL[] =
     "https://clients2.google.com/service/update2/crx";
 
-std::string GetWebstoreLaunchURL() {
+GURL GetWebstoreLaunchURL() {
   extensions::ExtensionsClient* client = extensions::ExtensionsClient::Get();
   if (client)
     return client->GetWebstoreBaseURL();
-  return kChromeWebstoreBaseURL;
+  return GURL(kChromeWebstoreBaseURL);
 }
 
+// TODO(csharrison,devlin): Migrate the following methods to return
+// GURLs.
+// TODO(devlin): Try to use GURL methods like Resolve instead of string
+// concatenation.
 std::string GetWebstoreExtensionsCategoryURL() {
-  return GetWebstoreLaunchURL() + "/category/extensions";
+  return GetWebstoreLaunchURL().spec() + "/category/extensions";
 }
 
 std::string GetWebstoreItemDetailURLPrefix() {
-  return GetWebstoreLaunchURL() + "/detail/";
+  return GetWebstoreLaunchURL().spec() + "/detail/";
 }
 
 GURL GetWebstoreItemJsonDataURL(const std::string& extension_id) {
-  return GURL(GetWebstoreLaunchURL() + "/inlineinstall/detail/" + extension_id);
+  return GURL(GetWebstoreLaunchURL().spec() + "/inlineinstall/detail/" +
+              extension_id);
 }
 
 GURL GetWebstoreJsonSearchUrl(const std::string& query,
                               const std::string& host_language_code) {
-  GURL url(GetWebstoreLaunchURL() + "/jsonsearch");
+  GURL url(GetWebstoreLaunchURL().spec() + "/jsonsearch");
   url = net::AppendQueryParameter(url, "q", query);
   url = net::AppendQueryParameter(url, "hl", host_language_code);
   return url;
 }
 
 GURL GetWebstoreSearchPageUrl(const std::string& query) {
-  return GURL(GetWebstoreLaunchURL() + "/search/" +
+  return GURL(GetWebstoreLaunchURL().spec() + "/search/" +
               net::EscapeQueryParamValue(query, false));
 }
 
@@ -75,7 +80,7 @@ GURL GetWebstoreUpdateUrl() {
 GURL GetWebstoreReportAbuseUrl(const std::string& extension_id,
                                const std::string& referrer_id) {
   return GURL(base::StringPrintf("%s/report/%s?utm_source=%s",
-                                 GetWebstoreLaunchURL().c_str(),
+                                 GetWebstoreLaunchURL().spec().c_str(),
                                  extension_id.c_str(), referrer_id.c_str()));
 }