[Android WebView] Migrate the rendering code to a separate set of classes.

android_webview/android_webview.gyp

Index: android_webview/android_webview.gyp
diff --git a/android_webview/android_webview.gyp b/android_webview/android_webview.gyp
index ab8691e15631b173184494471413a7321500169f..607c69d19e8c2b69e99c1c9737be6dd98c8aa808 100644
--- a/android_webview/android_webview.gyp
+++ b/android_webview/android_webview.gyp
@@ -104,6 +104,7 @@
         '../content/content.gyp:content',
         '../content/content.gyp:navigation_interception',
         '../skia/skia.gyp:skia',
+        '../ui/gl/gl.gyp:gl',
         'android_webview_pak',
       ],
       'include_dirs': [
@@ -153,8 +154,14 @@
         'browser/renderer_host/aw_render_view_host_ext.h',
         'browser/renderer_host/aw_resource_dispatcher_host_delegate.cc',
         'browser/renderer_host/aw_resource_dispatcher_host_delegate.h',
+        'browser/renderer_host/view_renderer_host.cc',
+        'browser/renderer_host/view_renderer_host.h',
         'browser/scoped_allow_wait_for_legacy_web_view_api.h',
         'browser/scoped_allow_wait_for_legacy_web_view_api.h',
+        'browser/view_renderer.cc',
+        'browser/view_renderer.h',
+        'browser/view_renderer_impl.cc',
+        'browser/view_renderer_impl.h',
         'common/android_webview_message_generator.cc',
         'common/android_webview_message_generator.h',
         'common/aw_content_client.cc',
@@ -179,6 +186,8 @@
         'renderer/aw_render_process_observer.h',
         'renderer/aw_render_view_ext.cc',
         'renderer/aw_render_view_ext.h',
+        'renderer/view_renderer_rv.cc',
+        'renderer/view_renderer_rv.h',
       ],
     },
     {