Allow extensions to add, remove, or change their page action popup.

chrome/browser/extensions/extension_page_actions_module.h

Index: chrome/browser/extensions/extension_page_actions_module.h
diff --git a/chrome/browser/extensions/extension_page_actions_module.h b/chrome/browser/extensions/extension_page_actions_module.h
index 8c0e2913a15c1c0792e22811faf945ef01cb78ad..3be9ce1f1dafe974eab32045d7ed1a68b1904d7f 100644
--- a/chrome/browser/extensions/extension_page_actions_module.h
+++ b/chrome/browser/extensions/extension_page_actions_module.h
@@ -10,6 +10,7 @@
 class TabContents;
 class ExtensionAction;
 
+// Base class for page action APIs.
 class PageActionFunction : public SyncExtensionFunction {
  protected:
   virtual ~PageActionFunction() {}
@@ -22,54 +23,70 @@ class PageActionFunction : public SyncExtensionFunction {
   TabContents* contents_;
 };
 
+// Implement chrome.pageActions.enableForTab().
 class EnablePageActionFunction : public PageActionFunction {
   ~EnablePageActionFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageActions.enableForTab")
 };
 
+// Implement chrome.pageActions.disableForTab().
 class DisablePageActionFunction : public PageActionFunction {
   ~DisablePageActionFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageActions.disableForTab")
 };
 
+// Implement chrome.pageActions.show().
 class PageActionShowFunction : public PageActionFunction {
   ~PageActionShowFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageAction.show")
 };
 
+// Implement chrome.pageActions.hide().
 class PageActionHideFunction : public PageActionFunction {
   ~PageActionHideFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageAction.hide")
 };
 
+// Implement chrome.pageActions.setIcon().
 class PageActionSetIconFunction : public PageActionFunction {
   ~PageActionSetIconFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageAction.setIcon")
 };
 
+// Implement chrome.pageActions.setTitle().
 class PageActionSetTitleFunction : public PageActionFunction {
   ~PageActionSetTitleFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageAction.setTitle")
 };
 
+// Implement chrome.pageActions.setPopup().
+class PageActionSetPopupFunction : public PageActionFunction {
+  ~PageActionSetPopupFunction() {}
+  virtual bool RunImpl();
+  DECLARE_EXTENSION_FUNCTION_NAME("pageAction.setPopup")
+};
+
+// Implement chrome.pageActions.setBadgeBackgroundColor().
 class PageActionSetBadgeBackgroundColorFunction : public PageActionFunction {
   ~PageActionSetBadgeBackgroundColorFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageAction.setBadgeBackgroundColor")
 };
 
+// Implement chrome.pageActions.setBadgeTextColor().
 class PageActionSetBadgeTextColorFunction : public PageActionFunction {
   ~PageActionSetBadgeTextColorFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageAction.setBadgeTextColor")
 };
 
+// Implement chrome.pageActions.setBadgeText().
 class PageActionSetBadgeTextFunction : public PageActionFunction {
   ~PageActionSetBadgeTextFunction() {}
   virtual bool RunImpl();