Add WebstoreInlineInstaller (downloads store data, shows the install UI, and starts the install).

chrome/browser/extensions/extension_install_dialog.h

Index: chrome/browser/extensions/extension_install_dialog.h
diff --git a/chrome/browser/extensions/extension_install_dialog.h b/chrome/browser/extensions/extension_install_dialog.h
index 2c0dcc13a3ce5026981884061b49b72ea1c4d3f4..4cc67fc5270ab2c4f1226fe518088e978ab70ace 100644
--- a/chrome/browser/extensions/extension_install_dialog.h
+++ b/chrome/browser/extensions/extension_install_dialog.h
@@ -8,6 +8,7 @@
 
 #include <vector>
 
+#include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 
@@ -15,6 +16,10 @@ class Extension;
 class Profile;
 class SkBitmap;
 
+namespace base {
+class DictionaryValue;
+}
+
 // The implementations of this function are platform-specific.
 void ShowExtensionInstallDialog(Profile* profile,
                                 ExtensionInstallUI::Delegate* delegate,
@@ -23,4 +28,25 @@ void ShowExtensionInstallDialog(Profile* profile,
                                 const std::vector<string16>& permissions,
                                 ExtensionInstallUI::PromptType type);
 
+// Wrapper around ShowExtensionInstallDialog that shows the install dialog for
+// a given manifest (that corresponds to an extension about to be installed with
+// ID |id|). If the name in the manifest is a localized placeholder, it may be
+// overidden with |localized_name| (which may be empty). The Extension instance
+// that's parsed is returned via |dummy_extension|.
+void ShowExtensionInstallDialogForManifest(
+    Profile *profile,
+    ExtensionInstallUI::Delegate* delegate,
+    const base::DictionaryValue* manifest,
+    const std::string& id,
+    const std::string& localized_name,
+    SkBitmap* icon,
+    ExtensionInstallUI::PromptType type,
+    scoped_refptr<Extension>* dummy_extension);
+
+// For use only in tests - sets a flag that makes invocations of
+// ShowExtensionInstallDialogForManifest skip putting up a real dialog, and
+// instead act as if the dialog choice was to proceed or abort.
+void SetExtensionInstallDialogForManifestAutoConfirmForTests(
+    bool should_proceed);
+
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_DIALOG_H_