Add chrome.webstore API methods to allow sites to see progress of installation

chrome/renderer/extensions/webstore_bindings.h

Index: chrome/renderer/extensions/webstore_bindings.h
diff --git a/chrome/renderer/extensions/webstore_bindings.h b/chrome/renderer/extensions/webstore_bindings.h
index b729150a9855753754dfb6c0c20657292c2e48de..ebcf0baafa61e3cb2eaa5b5b3ed05a64186195a0 100644
--- a/chrome/renderer/extensions/webstore_bindings.h
+++ b/chrome/renderer/extensions/webstore_bindings.h
@@ -9,6 +9,10 @@
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 
+namespace content {
+class RenderView;
+}
+
 namespace extensions {
 class ChromeV8Context;
 
@@ -25,11 +29,24 @@ class WebstoreBindings : public ChromeV8Extension,
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
  private:
+  // Returns the RenderView from the WebFrame, or NULL on failure.
+  content::RenderView* GetRenderView();
+
   void Install(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   void OnInlineWebstoreInstallResponse(
       int install_id, bool success, const std::string& error);
 
+  void OnInlineInstallStageChanged(const std::string& stage);
+
+  void OnInlineInstallDownloadProgress(int percent_downloaded);
+
+  void ValidateInstallStageListener(
+      const v8::FunctionCallbackInfo<v8::Value>& args);
+
+  void ValidateDownloadProgressListener(
+      const v8::FunctionCallbackInfo<v8::Value>& args);
+
   // Extracts a Web Store item ID from a <link rel="chrome-webstore-item"
   // href="https://chrome.google.com/webstore/detail/id"> node found in the
   // frame. On success, true will be returned and the |webstore_item_id|