Use kRenderClientId command line flag when starting a render process

content/common/renderer.mojom

 // Copyright 2016 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.
 
 module content.mojom;
 
+import "cc/ipc/frame_sink_id.mojom";
 import "content/common/native_types.mojom";
 import "ipc/ipc.mojom";
 import "ui/gfx/geometry/mojo/geometry.mojom";
 import "ui/gfx/mojo/icc_profile.mojom";
 
 struct CreateViewParams {
   // Renderer-wide preferences.
   RendererPreferences renderer_preferences;
 
   // Preferences for this view.
@@ skipping 47 matching lines @@
   gfx.mojom.Size min_size;
 
   // The maximum size to layout the page if auto-resize is enabled.
   gfx.mojom.Size max_size;
 
   // The page zoom level.
   double page_zoom_level;
 
   // The ICC profile of the output color space to use for image decode.
   gfx.mojom.ICCProfile image_decode_color_space;
+
+  cc.mojom.FrameSinkId frame_sink_id;
 };
 
 struct CreateFrameWidgetParams {
   // Gives the routing ID for the RenderWidget that will be attached to the
   // new RenderFrame. If the RenderFrame does not need a RenderWidget, this
   // is MSG_ROUTING_NONE and the other parameters are not read.
   int32 routing_id;
 
   // Tells the new RenderWidget whether it is initially hidden.
   bool hidden;
@@ skipping 82 matching lines @@
   UpdateScrollbarTheme(UpdateScrollbarThemeParams params);
 
   // Notification that the OS X Aqua color preferences changed.
   OnSystemColorsChanged(int32 aqua_color_variant, string highlight_text_color,
                         string highlight_color);
 
   // Tells the renderer to empty its plugin list cache, optional reloading
   // pages containing plugins.
   PurgePluginListCache(bool reload_pages);
 };