Start moving core pieces of Chrome multi-process code to src\content.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
===================================================================
--- chrome/chrome_browser.gypi	(revision 75300)
+++ chrome/chrome_browser.gypi	(working copy)
@@ -27,6 +27,7 @@
         'userfeedback_proto',
         '../app/app.gyp:app_resources',
         '../app/app.gyp:app_strings',
+        '../content/content.gyp:content_browser',
         '../media/media.gyp:media',
         '../ppapi/ppapi.gyp:ppapi_proxy',  # For PpapiMsg_LoadPlugin
         '../printing/printing.gyp:printing',
@@ -2302,24 +2303,8 @@
         'browser/sync/token_migrator.h',
         'browser/tab_closeable_state_watcher.cc',
         'browser/tab_closeable_state_watcher.h',
-        'browser/tab_contents/background_contents.cc',
-        'browser/tab_contents/background_contents.h',
-        'browser/tab_contents/constrained_window.h',
-        'browser/tab_contents/infobar_delegate.cc',
-        'browser/tab_contents/infobar_delegate.h',
-        'browser/tab_contents/interstitial_page.cc',
-        'browser/tab_contents/interstitial_page.h',
-        'browser/tab_contents/language_state.cc',
-        'browser/tab_contents/language_state.h',
-        'browser/tab_contents/navigation_controller.cc',
-        'browser/tab_contents/navigation_controller.h',
-        'browser/tab_contents/navigation_entry.cc',
-        'browser/tab_contents/navigation_entry.h',
-        'browser/tab_contents/page_navigator.h',
         'browser/tab_contents/popup_menu_helper_mac.h',
         'browser/tab_contents/popup_menu_helper_mac.mm',
-        'browser/tab_contents/provisional_load_details.cc',
-        'browser/tab_contents/provisional_load_details.h',
         'browser/tab_contents/render_view_context_menu.cc',
         'browser/tab_contents/render_view_context_menu.h',
         'browser/tab_contents/render_view_context_menu_gtk.cc',
@@ -2328,18 +2313,8 @@
         'browser/tab_contents/render_view_context_menu_mac.mm',
         'browser/tab_contents/render_view_host_delegate_helper.cc',
         'browser/tab_contents/render_view_host_delegate_helper.h',
-        'browser/tab_contents/render_view_host_manager.cc',
-        'browser/tab_contents/render_view_host_manager.h',
-        'browser/tab_contents/tab_contents.cc',
-        'browser/tab_contents/tab_contents.h',
-        'browser/tab_contents/tab_contents_delegate.cc',
-        'browser/tab_contents/tab_contents_delegate.h',
-        'browser/tab_contents/tab_contents_observer.cc',
-        'browser/tab_contents/tab_contents_observer.h',
         'browser/tab_contents/tab_contents_ssl_helper.cc',
         'browser/tab_contents/tab_contents_ssl_helper.h',
-        'browser/tab_contents/tab_contents_view.cc',
-        'browser/tab_contents/tab_contents_view.h',
         'browser/tab_contents/tab_contents_view_gtk.cc',
         'browser/tab_contents/tab_contents_view_gtk.h',
         'browser/tab_contents/tab_contents_view_mac.h',