Add "sidebar" section to extension manifest:...

chrome/browser/sidebar/sidebar_container.cc

 // Copyright (c) 2010 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/sidebar/sidebar_container.h"
 
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/tab_contents/navigation_controller.h"
 #include "chrome/browser/tab_contents/navigation_entry.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "chrome/common/bindings_policy.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_resource.h"
+#include "chrome/common/extensions/extension_sidebar_defaults.h"
+#include "chrome/common/extensions/extension_sidebar_utils.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 SidebarContainer::SidebarContainer(TabContents* tab,
                                    const std::string& content_id,
                                    Delegate* delegate)
     : tab_(tab),
       content_id_(content_id),
       delegate_(delegate),
-      icon_(new SkBitmap) {
+      icon_(new SkBitmap),
+      navigate_to_default_url_on_expand_(true),
+      use_default_icon_(true) {
   // Create TabContents for sidebar.
   sidebar_contents_.reset(
       new TabContents(tab->profile(), NULL, MSG_ROUTING_NONE, NULL, NULL));
   sidebar_contents_->render_view_host()->set_is_extension_process(true);
   sidebar_contents_->render_view_host()->AllowBindings(
       BindingsPolicy::EXTENSION);
   sidebar_contents_->set_delegate(this);
 }
 
 SidebarContainer::~SidebarContainer() {
 }
 
 void SidebarContainer::SidebarClosing() {
   delegate_->UpdateSidebar(this);
 }
 
+void SidebarContainer::LoadDefaults() {
+  const Extension* extension = GetExtension();
+  if (!extension)
+    return;  // Can be NULL in tests.
+  const ExtensionSidebarDefaults* sidebar_defaults =
+      extension->sidebar_defaults();
+
+  title_ = sidebar_defaults->default_title();
+
+  if (!sidebar_defaults->default_icon_path().empty()) {
+    image_loading_tracker_.reset(new ImageLoadingTracker(this));
+    image_loading_tracker_->LoadImage(
+        extension,
+        extension->GetResource(sidebar_defaults->default_icon_path()),
+        gfx::Size(Extension::kSidebarIconMaxSize,
+                  Extension::kSidebarIconMaxSize),
+        ImageLoadingTracker::CACHE);
+  }
+}
+
 void SidebarContainer::Show() {
   delegate_->UpdateSidebar(this);
 }
 
 void SidebarContainer::Expand() {
+  if (navigate_to_default_url_on_expand_) {
+    navigate_to_default_url_on_expand_ = false;
+    // Check whether a default URL is specified for this sidebar.
+    const Extension* extension = GetExtension();
+    if (extension) {  // Can be NULL in tests.
+      if (extension->sidebar_defaults()->default_url().is_valid())
+        Navigate(extension->sidebar_defaults()->default_url());
+    }
+  }
+
   delegate_->UpdateSidebar(this);
   sidebar_contents_->view()->SetInitialFocus();
 }
 
 void SidebarContainer::Collapse() {
   delegate_->UpdateSidebar(this);
 }
 
 void SidebarContainer::Navigate(const GURL& url) {
-  DCHECK(sidebar_contents_.get());
   // TODO(alekseys): add a progress UI.
+  navigate_to_default_url_on_expand_ = false;
   sidebar_contents_->controller().LoadURL(
       url, GURL(), PageTransition::START_PAGE);
 }
 
 void SidebarContainer::SetBadgeText(const string16& badge_text) {
   badge_text_ = badge_text;
 }
 
 void SidebarContainer::SetIcon(const SkBitmap& bitmap) {
+  use_default_icon_ = false;
   *icon_ = bitmap;
 }
 
 void SidebarContainer::SetTitle(const string16& title) {
   title_ = title;
 }
 
 bool SidebarContainer::IsPopup(const TabContents* source) const {
   return false;
 }
 
+void SidebarContainer::OnImageLoaded(SkBitmap* image,
+                                     ExtensionResource resource,
+                                     int index) {
+  if (image && use_default_icon_) {
+    *icon_ = *image;
+     delegate_->UpdateSidebar(this);
+  }
+}
+
+const Extension* SidebarContainer::GetExtension() const {
+  ExtensionService* service =
+      sidebar_contents_->profile()->GetExtensionService();
+  if (!service)
+    return NULL;
+  return service->GetExtensionById(
+      extension_sidebar_utils::GetExtensionIdByContentId(content_id_), false);
+}