Remove support for page_action.icons, and the legacy code surrounding it.

chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm

Index: chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm b/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
index 53292773ca13789b7274c1c2df3b310b3054abc7..4027e9753c772c4f4a89ec9822ea5f0b04be7f32 100644
--- a/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
+++ b/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
@@ -60,15 +60,9 @@ PageActionDecoration::PageActionDecoration(
       GetExtensionById(page_action->extension_id(), false);
   DCHECK(extension);
 
-  // Load all the icons declared in the manifest. This is the contents of the
-  // icons array, plus the default_icon property, if any.
-  std::vector<std::string> icon_paths(*page_action->icon_paths());
-  if (!page_action_->default_icon_path().empty())
-    icon_paths.push_back(page_action_->default_icon_path());
-
-  for (std::vector<std::string>::iterator iter = icon_paths.begin();
-       iter != icon_paths.end(); ++iter) {
-    tracker_.LoadImage(extension, extension->GetResource(*iter),
+  std::string path = page_action_->default_icon_path();
+  if (!path.empty()) {
+    tracker_.LoadImage(extension, extension->GetResource(path),
                        gfx::Size(Extension::kPageActionIconMaxSize,
                                  Extension::kPageActionIconMaxSize),
                        ImageLoadingTracker::DONT_CACHE);
@@ -144,19 +138,7 @@ bool PageActionDecoration::ActivatePageAction(NSRect frame) {
 void PageActionDecoration::OnImageLoaded(const gfx::Image& image,
                                          const std::string& extension_id,
                                          int index) {
-  // We loaded icons()->size() icons, plus one extra if the Page Action had
-  // a default icon.
-  int total_icons = static_cast<int>(page_action_->icon_paths()->size());
-  if (!page_action_->default_icon_path().empty())
-    total_icons++;
-  DCHECK(index < total_icons);
-
-  // Map the index of the loaded image back to its name. If we ever get an
-  // index greater than the number of icons, it must be the default icon.
-  if (index < static_cast<int>(page_action_->icon_paths()->size()))
-    page_action_->CacheIcon(page_action_->icon_paths()->at(index), image);
-  else
-    page_action_->CacheIcon(page_action_->default_icon_path(), image);
+  page_action_->CacheIcon(image);
 
   // If we have no owner, that means this class is still being constructed.
   TabContents* tab_contents = owner_ ? owner_->GetTabContents() : NULL;