Fix for plugin id is showing instead of plugin path in chrome://plugins.

chrome/browser/extensions/plugin_manager.cc

Index: chrome/browser/extensions/plugin_manager.cc
diff --git a/chrome/browser/extensions/plugin_manager.cc b/chrome/browser/extensions/plugin_manager.cc
index 3676bdb78bcf6a53cf739b4de2b7f31ac8135616..0dcbe0cf97e1a06b5285a5a27baa46ac7416c718 100644
--- a/chrome/browser/extensions/plugin_manager.cc
+++ b/chrome/browser/extensions/plugin_manager.cc
@@ -23,6 +23,9 @@
 #include "components/nacl/common/nacl_constants.h"
 #endif
 
+const char kPDFPluginExtension[] = "pdf";
+const char kPDFPluginDescription[] = "Portable Document Format";
+
 using content::PluginService;
 
 namespace extensions {
@@ -90,7 +93,8 @@ void PluginManager::OnExtensionLoaded(content::BrowserContext* browser_context,
     content::WebPluginInfo info;
     info.type = content::WebPluginInfo::PLUGIN_TYPE_BROWSER_PLUGIN;
     info.name = base::UTF8ToUTF16(extension->name());
-    info.path = base::FilePath::FromUTF8Unsafe(handler->extension_id());
+    info.path = extension->path();

[raymes, 2015/01/22 03:23:40]

The path is sort of unimportant. We could display the URL of the extension if we
really wanted.

+    info.version = base::UTF8ToUTF16(extension->GetVersionForDisplay());

[raymes, 2015/01/22 03:23:40]

Since this is bundled with Chrome, let's not version it (note that there is
currently no version displayed)

 
     for (std::set<std::string>::const_iterator mime_type =
          handler->mime_type_set().begin();
@@ -99,8 +103,13 @@ void PluginManager::OnExtensionLoaded(content::BrowserContext* browser_context,
       mime_type_info.mime_type = *mime_type;
       base::FilePath::StringType file_extension;
       if (net::GetPreferredExtensionForMimeType(*mime_type, &file_extension)) {
-        mime_type_info.file_extensions.push_back(
-            base::FilePath(file_extension).AsUTF8Unsafe());
+        std::string mime_file_extension =
+            base::FilePath(file_extension).AsUTF8Unsafe();
+        mime_type_info.file_extensions.push_back(mime_file_extension);
+        if (!mime_file_extension.compare(std::string(kPDFPluginExtension))) {
+          mime_type_info.description =
+              base::UTF8ToUTF16(std::string(kPDFPluginDescription));
+        }

[raymes, 2015/01/22 03:23:40]

We don't need to have a description (there currently isn't one). This isn't very
nice because it's PDF specific so let's avoid it.

       }
       info.mime_types.push_back(mime_type_info);
     }