[OriginChip] Don't crash for invalid extension URL

If the user enters a chrome-extension:// url with an invalid extension
id, let's not crash. That's rude.

Instead, origin chip will display <id> as extension name, show a "page
not available" message.

BUG=375426

Review URL: https://codereview.chromium.org/291173008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273020 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/toolbar/origin_chip_info.cc

@@ -111,12 +111,14 @@ bool OriginChipInfo::Update(const content::WebContents* web_contents,
                                         label_);
   }
 
-  if (displayed_url_.SchemeIs(extensions::kExtensionScheme)) {
-    icon_ = IDR_EXTENSIONS_FAVICON;
 
+  if (displayed_url_.SchemeIs(extensions::kExtensionScheme)) {
     const extensions::Extension* extension =
         extensions::ExtensionSystem::Get(profile_)->extension_service()->
             extensions()->GetExtensionOrAppByURL(displayed_url_);
+
+    if (extension) {
+      icon_ = IDR_EXTENSIONS_FAVICON;
       extension_icon_image_.reset(
           new extensions::IconImage(profile_,
                                     extension,
@@ -129,7 +131,11 @@ bool OriginChipInfo::Update(const content::WebContents* web_contents,
       extension_icon_image_->image_skia().GetRepresentation(1.0f);
       if (!extension_icon_image_->image_skia().image_reps().empty())
         owner_->OnExtensionIconImageChanged(extension_icon_image_.get());
-  } else {
+
+      return true;
+    }
+  }
+
   if (extension_icon_image_) {
     extension_icon_image_.reset();
     owner_->OnExtensionIconImageChanged(NULL);
@@ -139,7 +145,6 @@ bool OriginChipInfo::Update(const content::WebContents* web_contents,
            displayed_url_.SchemeIs(content::kChromeUIScheme)) ?
       IDR_PRODUCT_LOGO_16 :
       toolbar_model->GetIconForSecurityLevel(security_level_);
-  }
 
   return true;
 }