intents: Change default_service_url() to return a const-ref.

chrome/browser/ui/intents/web_intents_model.h

Index: chrome/browser/ui/intents/web_intents_model.h
diff --git a/chrome/browser/ui/intents/web_intents_model.h b/chrome/browser/ui/intents/web_intents_model.h
index 3ded493ce765529e80b932fb806eb6656d345f35..1228f349ec4864278de935dffd5b6926350a7703 100644
--- a/chrome/browser/ui/intents/web_intents_model.h
+++ b/chrome/browser/ui/intents/web_intents_model.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_UI_INTENTS_WEB_INTENTS_MODEL_H_
 #define CHROME_BROWSER_UI_INTENTS_WEB_INTENTS_MODEL_H_
 
+#include "base/basictypes.h"
 #include "base/values.h"
 #include "chrome/browser/intents/web_intents_registry.h"
 #include "ui/base/models/tree_node_model.h"
@@ -19,17 +20,16 @@ struct DefaultWebIntentService;
 // services.
 class WebIntentsTreeNode : public ui::TreeNode<WebIntentsTreeNode> {
  public:
-  WebIntentsTreeNode();
-  explicit WebIntentsTreeNode(const string16& title);
-
-  virtual ~WebIntentsTreeNode();
-
   enum NodeType {
     TYPE_ROOT,
     TYPE_ORIGIN,
     TYPE_SERVICE,
   };
 
+  WebIntentsTreeNode();
+  explicit WebIntentsTreeNode(const string16& title);
+  virtual ~WebIntentsTreeNode();
+
   NodeType Type() const { return type_; }
 
  protected:
@@ -39,6 +39,8 @@ class WebIntentsTreeNode : public ui::TreeNode<WebIntentsTreeNode> {
 
  private:
   NodeType type_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebIntentsTreeNode);
 };
 
 // Tree node representing particular services presented by an origin.
@@ -55,11 +57,13 @@ class ServiceTreeNode : public WebIntentsTreeNode {
   bool IsBlocked() const { return blocked_; }
   bool IsDisabled() const { return disabled_; }
 
-  void SetServiceName(string16 name) { service_name_ = name; }
-  void SetServiceUrl(string16 url) { service_url_ = url; }
-  void SetIconUrl(string16 url) { icon_url_ = url; }
-  void SetAction(string16 action) { action_ = action; }
-  void AddType(string16 type) { types_.Append(Value::CreateStringValue(type)); }
+  void SetServiceName(const string16& name) { service_name_ = name; }
+  void SetServiceUrl(const string16& url) { service_url_ = url; }
+  void SetIconUrl(const string16& url) { icon_url_ = url; }
+  void SetAction(const string16& action) { action_ = action; }
+  void AddType(const string16& type) {
+    types_.Append(Value::CreateStringValue(type));
+  }
   void SetBlocked(bool blocked) { blocked_ = blocked; }
   void SetDisabled(bool disabled) { disabled_ = disabled; }
 
@@ -73,6 +77,8 @@ class ServiceTreeNode : public WebIntentsTreeNode {
   // TODO(gbillock): these are kind of a placeholder for exceptions data.
   bool blocked_;
   bool disabled_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceTreeNode);
 };
 
 // UI-backing tree model of the data in the WebIntentsRegistry.
@@ -83,6 +89,8 @@ class WebIntentsModel : public ui::TreeNodeModel<WebIntentsTreeNode> {
   // observers for every item added.
   class Observer : public ui::TreeModelObserver {
    public:
+    virtual ~Observer() {}
+
     virtual void TreeModelBeginBatch(WebIntentsModel* model) {}
     virtual void TreeModelEndBatch(WebIntentsModel* model) {}
   };
@@ -94,8 +102,10 @@ class WebIntentsModel : public ui::TreeNodeModel<WebIntentsTreeNode> {
   void RemoveWebIntentsTreeObserver(Observer* observer);
 
   string16 GetTreeNodeId(WebIntentsTreeNode* node);
-  WebIntentsTreeNode* GetTreeNode(std::string path_id);
-  void GetChildNodeList(WebIntentsTreeNode* parent, int start, int count,
+  WebIntentsTreeNode* GetTreeNode(const std::string& path_id);
+  void GetChildNodeList(WebIntentsTreeNode* parent,
+                        int start,
+                        int count,
                         base::ListValue* nodes);
   void GetWebIntentsTreeNodeDictionary(const WebIntentsTreeNode& node,
                                        base::DictionaryValue* dict);
@@ -124,6 +134,8 @@ class WebIntentsModel : public ui::TreeNodeModel<WebIntentsTreeNode> {
   // Batch update nesting level. Incremented to indicate that we're in
   // the middle of a batch update.
   int batch_update_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebIntentsModel);
 };
 
 #endif  // CHROME_BROWSER_UI_INTENTS_WEB_INTENTS_MODEL_H_