Add a Content API around BrowserChildProcessHost, similar to what was done with ChildProcessHost....

content/content_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../net/net.gyp:http_server',
     '../net/net.gyp:net',
     '../ppapi/ppapi_internal.gyp:ppapi_proxy',
     '../skia/skia.gyp:skia',
     '../third_party/flac/flac.gyp:libflac',
     '../third_party/speex/speex.gyp:libspeex',
     '../third_party/WebKit/Source/WebKit/chromium/WebKit.gyp:webkit',
     '../third_party/zlib/zlib.gyp:zlib',
     '../ui/gfx/surface/surface.gyp:surface',
     '../ui/ui.gyp:ui',
     '../ui/ui.gyp:ui_resources',
     '../webkit/support/webkit_support.gyp:webkit_resources',
     '../webkit/support/webkit_support.gyp:webkit_strings',
   ],
   'include_dirs': [
     '..',
     '<(INTERMEDIATE_DIR)',
   ],
   'sources': [
     'public/browser/access_token_store.cc',
     'public/browser/access_token_store.h',
+    'public/browser/browser_child_process_host.h',
+    'public/browser/browser_child_process_host_delegate.cc',
+    'public/browser/browser_child_process_host_delegate.h',
+    'public/browser/browser_child_process_host_iterator.cc',
+    'public/browser/browser_child_process_host_iterator.h',
     'public/browser/browser_context.h',
     'public/browser/browser_main_parts.h',
     'public/browser/browser_message_filter.cc',
     'public/browser/browser_message_filter.h',
     'public/browser/browser_shutdown.h',
     'public/browser/browser_thread.h',
     'public/browser/browser_thread_delegate.h',
     'public/browser/child_process_data.h',
     'public/browser/content_browser_client.h',
     'public/browser/content_ipc_logging.h',
@@ skipping 789 matching lines @@
         'ENABLE_JAVA_BRIDGE',
       ],
     }, {
       'sources/': [
         ['exclude', '^browser/renderer_host/java/'],
       ],
     }],
   ],
 }