Bring up of the metadata accessors for enhanced bookmarks.

components/enhanced_bookmarks/proto/metadata.proto

Index: components/enhanced_bookmarks/proto/metadata.proto
diff --git a/components/enhanced_bookmarks/proto/metadata.proto b/components/enhanced_bookmarks/proto/metadata.proto
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+// Copyright 2014 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.
+//
+syntax = "proto2";
+option optimize_for = LITE_RUNTIME;
+
+package image.collections;
+
+message ImageData {
+  // Encrypted 64-bit image doc id, if it has been crawled,
+  // e.g. "kY7_4LKgNqDrbM:"
+  optional string doc_id = 1;
+
+  message ImageInfo {
+    // The (normalized) URL this image can be found at.
+    optional string url = 1;
+
+    // The dimensions in pixels.
+    optional int32 width = 2;
+    optional int32 height = 3;
+  }
+
+  // Information about the original collected image.
+  optional ImageInfo original_info = 2;
+
+  // Information about the server hosted thumbnail.
+  optional ImageInfo thumbnail_info = 3;
+}
+
+message PageData {
+  // The title of the web page.
+  optional string title = 1;
+
+  // A snippet of text from the web page, either computed by us or chosen by
+  // the user.
+  optional string snippet = 2;
+
+  // The (normalized) URL of the web page.
+  optional string url = 3;
+
+  // The /url redirect signed URL for the web page.  This could be appended to
+  // "www.google.com" to create a URL redirect.
+  optional string signed_url = 5;
+
+  // The doc id of the page, if in the index. Uses the same encrypted docid
+  // format as ImageData.
+  optional string doc_id = 4;
+}