Implement the skeleton of an android content shell.

content/content_browser.gypi

Index: content/content_browser.gypi
diff --git a/content/content_browser.gypi b/content/content_browser.gypi
index 1ef5f79ee793a376f092c8a757ed0551cf0bc4d8..77327b7a2916eb1e141b6883bc94031593021c6d 100644
--- a/content/content_browser.gypi
+++ b/content/content_browser.gypi
@@ -174,6 +174,10 @@
     'browser/accessibility/browser_accessibility_state_impl.h',
     'browser/accessibility/browser_accessibility_win.cc',
     'browser/accessibility/browser_accessibility_win.h',
+    'browser/android/jni_helper.cc',
+    'browser/android/jni_helper.h',
+    'browser/android/library_loader_hooks.cc',
+    'browser/android/library_loader_hooks.h',
     'browser/appcache/appcache_dispatcher_host.cc',
     'browser/appcache/appcache_dispatcher_host.h',
     'browser/appcache/appcache_frontend_proxy.cc',
@@ -797,11 +801,6 @@
       ],
     }],
     ['OS=="android"', {
-      'sources!': [
-        # A main loop would be handled in Java.
-        'browser/browser_main_loop.cc',
-        'browser/browser_main_loop.h',
-      ],
       'dependencies!': [
         '../third_party/flac/flac.gyp:libflac',
       ]}],