Chrome side to implement WebMimeRegistry.

chrome/renderer/renderer_webkitclient_impl.cc

+// Copyright (c) 2009 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/renderer/renderer_webkitclient_impl.h"
+
+#include "WebString.h"
+
+#include "chrome/common/render_messages.h"
+#include "chrome/plugin/npobject_util.h"
+#include "chrome/renderer/render_thread.h"
+#include "webkit/glue/glue_util.h"
+
+using WebKit::WebString;
+
+WebString RendererWebKitClientImpl::MimeRegistry::mimeTypeForExtension(
+    const WebString& file_extension) {
+  if (IsPluginProcess())
+    return SimpleWebMimeRegistryImpl::mimeTypeForExtension(file_extension);
+
+  // The sandbox restricts our access to the registry, so we need to proxy
+  // these calls over to the browser process.
+  std::string mime_type;
+  RenderThread::current()->Send(new ViewHostMsg_GetMimeTypeFromExtension(
+      webkit_glue::WebStringToFilePathString(file_extension), &mime_type));
+  return ASCIIToUTF16(mime_type);
+  
+}
+
+WebString RendererWebKitClientImpl::MimeRegistry::mimeTypeFromFile(
+    const WebString& file_path) {
+  if (IsPluginProcess())
+    return SimpleWebMimeRegistryImpl::mimeTypeFromFile(file_path);
+
+  // The sandbox restricts our access to the registry, so we need to proxy
+  // these calls over to the browser process.
+  std::string mime_type;
+  RenderThread::current()->Send(new ViewHostMsg_GetMimeTypeFromFile(
+      FilePath(webkit_glue::WebStringToFilePathString(file_path)),
+      &mime_type));
+  return ASCIIToUTF16(mime_type);
+  
+}
+
+WebString RendererWebKitClientImpl::MimeRegistry::preferredExtensionForMIMEType(
+    const WebString& mime_type) {
+  if (IsPluginProcess())
+    return SimpleWebMimeRegistryImpl::preferredExtensionForMIMEType(mime_type);
+
+  // The sandbox restricts our access to the registry, so we need to proxy
+  // these calls over to the browser process.
+  FilePath::StringType file_extension;
+  RenderThread::current()->Send(
+      new ViewHostMsg_GetPreferredExtensionForMimeType(UTF16ToASCII(mime_type),
+          &file_extension));
+  return webkit_glue::FilePathStringToWebString(file_extension);
+}