Remove android_webview/browser layer's dependency on native

android_webview/browser/browser_view_renderer.h

Index: android_webview/browser/browser_view_renderer.h
diff --git a/android_webview/browser/browser_view_renderer.h b/android_webview/browser/browser_view_renderer.h
index e47104936c96b0c63e915e74c37364275227d8c0..00cf4e7b2c1637726df476279eaa39268810db78 100644
--- a/android_webview/browser/browser_view_renderer.h
+++ b/android_webview/browser/browser_view_renderer.h
@@ -18,6 +18,10 @@
 class SkCanvas;
 class SkPicture;
 
+namespace content {
+class WebContents;
+}
+
 namespace android_webview {
 
 class BrowserViewRendererClient;
@@ -27,6 +31,8 @@ class BrowserViewRendererClient;
 class BrowserViewRenderer : public content::SynchronousCompositorClient {
  public:
   static void CalculateTileMemoryPolicy();
+  static BrowserViewRenderer* FromWebContents(
+      content::WebContents* web_contents);
 
   BrowserViewRenderer(
       BrowserViewRendererClient* client,
@@ -34,6 +40,8 @@ class BrowserViewRenderer : public content::SynchronousCompositorClient {
 
   ~BrowserViewRenderer() override;
 
+  void RegisterWithWebContents(content::WebContents* web_contents);
+
   SharedRendererState* GetAwDrawGLViewContext();
   bool RequestDrawGL(bool wait_for_completion);