[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 195782b6699c80ce12458704096c45cd0c6de15d..8010ba8be7cec921f724700e0ac204634de5d87e 100644
--- a/android_webview/android_webview.gyp
+++ b/android_webview/android_webview.gyp
@@ -107,6 +107,7 @@
         '../components/components.gyp:web_contents_delegate_android',
         '../content/content.gyp:content',
         '../skia/skia.gyp:skia',
+        '../ui/gl/gl.gyp:gl',
         'android_webview_pak',
       ],
       'include_dirs': [
@@ -135,6 +136,9 @@
         'browser/aw_request_interceptor.cc',
         'browser/aw_request_interceptor.h',
         'browser/aw_result_codes.h',
+        'browser/browser_view_renderer.h',
+        'browser/browser_view_renderer_impl.cc',
+        'browser/browser_view_renderer_impl.h',
         'browser/find_helper.cc',
         'browser/find_helper.h',
         'browser/icon_helper.cc',
@@ -158,6 +162,8 @@
         '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',
         'common/android_webview_message_generator.cc',
@@ -184,6 +190,8 @@
         'renderer/aw_render_process_observer.h',
         'renderer/aw_render_view_ext.cc',
         'renderer/aw_render_view_ext.h',
+        'renderer/view_renderer.cc',
+        'renderer/view_renderer.h',
       ],
     },
     {