This is essentially just a similarity=50 version of https://codereview.chromium.org/95133002/ and i…

chrome/browser/extensions/extension_message_bubble_controller.cc

Index: chrome/browser/extensions/extension_message_bubble_controller.cc
diff --git a/chrome/browser/extensions/extension_message_bubble_controller.cc b/chrome/browser/extensions/extension_message_bubble_controller.cc
new file mode 100644
index 0000000000000000000000000000000000000000..90935c11a877c533e56dd24d80c50eef8627f283
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+++ b/chrome/browser/extensions/extension_message_bubble_controller.cc
@@ -0,0 +1,151 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/extensions/extension_message_bubble_controller.h"
+
+#include "base/bind.h"
+#include "base/metrics/histogram.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/extensions/extension_message_bubble.h"
+#include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_finder.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/user_metrics.h"
+#include "grit/chromium_strings.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace extensions {
+
+////////////////////////////////////////////////////////////////////////////////
+// ExtensionMessageBubbleController
+
+ExtensionMessageBubbleController::ExtensionMessageBubbleController(
+    Delegate* delegate, Profile* profile)
+    : service_(extensions::ExtensionSystem::Get(profile)->extension_service()),
+      profile_(profile),
+      user_action_(ACTION_BOUNDARY),
+      delegate_(delegate),
+      initialized_(false),
+      has_notified_(false) {
+}
+
+ExtensionMessageBubbleController::~ExtensionMessageBubbleController() {
+}
+
+bool ExtensionMessageBubbleController::ShouldShow() {
+  if (has_notified_)
+    return false;
+
+  has_notified_ = true;
+  return !GetOrCreateExtensionList()->empty();
+}
+
+std::vector<string16>
+ExtensionMessageBubbleController::GetExtensionList() {
+  ExtensionIdList* list = GetOrCreateExtensionList();
+  if (list->empty())
+    return std::vector<string16>();
+
+  std::vector<string16> return_value;
+  for (ExtensionIdList::const_iterator it = list->begin();
+       it != list->end(); ++it) {
+    const Extension* extension = service_->GetInstalledExtension(*it);
+    if (extension) {
+      return_value.push_back(UTF8ToUTF16(extension->name()));
+    } else {
+      return_value.push_back(
+          ASCIIToUTF16(std::string("(unknown name) ") + *it));
+      // TODO(finnur): Add this as a string to the grd, for next milestone.
+    }
+  }
+  return return_value;
+}
+
+const ExtensionIdList& ExtensionMessageBubbleController::GetExtensionIdList() {
+  return *GetOrCreateExtensionList();
+}
+
+void ExtensionMessageBubbleController::Show(ExtensionMessageBubble* bubble) {
+  // Wire up all the callbacks, to get notified what actions the user took.
+  base::Closure dismiss_button_callback =
+      base::Bind(&ExtensionMessageBubbleController::OnBubbleDismiss,
+      base::Unretained(this));
+  base::Closure action_button_callback =
+      base::Bind(&ExtensionMessageBubbleController::OnBubbleAction,
+      base::Unretained(this));
+  base::Closure link_callback =
+      base::Bind(&ExtensionMessageBubbleController::OnLinkClicked,
+      base::Unretained(this));
+  bubble->OnActionButtonClicked(action_button_callback);
+  bubble->OnDismissButtonClicked(dismiss_button_callback);
+  bubble->OnLinkClicked(link_callback);
+
+  bubble->Show();
+}
+
+void ExtensionMessageBubbleController::OnBubbleAction() {
+  DCHECK_EQ(ACTION_BOUNDARY, user_action_);
+  user_action_ = ACTION_EXECUTE;
+
+  delegate_->LogAction(ACTION_EXECUTE);
+  delegate_->PerformAction(*GetOrCreateExtensionList());
+  AcknowledgeExtensions();
+}
+
+void ExtensionMessageBubbleController::OnBubbleDismiss() {
+  DCHECK_EQ(ACTION_BOUNDARY, user_action_);
+  user_action_ = ACTION_DISMISS;
+
+  delegate_->LogAction(ACTION_DISMISS);
+  AcknowledgeExtensions();
+}
+
+void ExtensionMessageBubbleController::OnLinkClicked() {
+  DCHECK_EQ(ACTION_BOUNDARY, user_action_);
+  user_action_ = ACTION_LEARN_MORE;
+
+  delegate_->LogAction(ACTION_LEARN_MORE);
+  Browser* browser =
+      chrome::FindBrowserWithProfile(profile_, chrome::GetActiveDesktop());
+  if (browser) {
+    browser->OpenURL(
+        content::OpenURLParams(delegate_->GetLearnMoreUrl(),
+                               content::Referrer(),
+                               NEW_FOREGROUND_TAB,
+                               content::PAGE_TRANSITION_LINK,
+                               false));
+  }
+  AcknowledgeExtensions();
+}
+
+void ExtensionMessageBubbleController::AcknowledgeExtensions() {
+  ExtensionIdList* list = GetOrCreateExtensionList();
+  for (ExtensionIdList::const_iterator it = list->begin();
+       it != list->end(); ++it)
+    delegate_->AcknowledgeExtension(*it, user_action_);
+}
+
+ExtensionIdList* ExtensionMessageBubbleController::GetOrCreateExtensionList() {
+  if (!initialized_) {
+    scoped_ptr<const ExtensionSet> extension_set(
+        service_->GenerateInstalledExtensionsSet());
+    for (ExtensionSet::const_iterator it = extension_set->begin();
+         it != extension_set->end(); ++it) {
+      std::string id = (*it)->id();
+      if (!delegate_->ShouldIncludeExtension(id))
+        continue;
+      extension_list_.push_back(id);
+    }
+
+    delegate_->LogExtensionCount(extension_list_.size());
+    initialized_ = true;
+  }
+
+  return &extension_list_;
+}
+
+}  // namespace extensions