Remove --enable-p2papi flag.

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains definitions of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 4223 matching lines @@
       <message name="IDS_FLAGS_DISABLE_GPU_VSYNC_DESCRIPTION" desc="Description of the 'Disable GPU VSync' lab.">
         Disables synchronization with the display's vertical refresh rate when GPU rendering. This allows frame rates to exceed
         60 hertz. While useful for benchmarking purposes, this also results in visual tearing during rapid screen updates.
       </message>
       <message name="IDS_FLAGS_WEBGL_NAME" desc="Name of the 'WebGL' lab.">
         WebGL
       </message>
       <message name="IDS_FLAGS_WEBGL_DESCRIPTION" desc="Description of the 'WebGL' lab.">
         Enables canvas elements to use 3D graphics via the WebGL API.
       </message>
-      <message name="IDS_FLAGS_P2P_API_NAME" desc="Name of the 'P2P API' lab.">
-        P2P API
-      </message>
-      <message name="IDS_FLAGS_P2P_API_DESCRIPTION" desc="Description of the 'P2P API' lab.">
-        Enables P2P Pepper API and P2P JavaScript API. The API is under development, and doesn't work yet.
-      </message>
       <message name="IDS_FLAGS_PRINT_PREVIEW_NAME" desc="Name of the 'Print Preview' lab.">
         Print Preview
       </message>
       <message name="IDS_FLAGS_PRINT_PREVIEW_DESCRIPTION" desc="Description of the 'Print Preview' lab.">
         Enables an in-tab preview of a print operation.
       </message>
       <message name="IDS_FLAGS_DNS_SERVER_NAME" desc="">
         User specified DNS server address.
       </message>
       <message name="IDS_FLAGS_DNS_SERVER_DESCRIPTION" desc="">
@@ skipping 8734 matching lines @@
     </includes>
     <structures fallback_to_english="true">
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
 
   </release>
 </grit>