aw: Remove legacy rendering path

android_webview/browser/hardware_renderer.cc

Index: android_webview/browser/hardware_renderer.cc
diff --git a/android_webview/browser/hardware_renderer.cc b/android_webview/browser/hardware_renderer.cc
index a1518005d89e89392768b31a573e6b4e4759d64e..28a78db89ce2f5f58dcf3c9e6de75f2357165965 100644
--- a/android_webview/browser/hardware_renderer.cc
+++ b/android_webview/browser/hardware_renderer.cc
@@ -126,8 +126,7 @@ void HardwareRenderer::DidBeginMainFrame() {
 
 bool HardwareRenderer::DrawGL(bool stencil_enabled,

[hush (inactive), 2014/06/16 21:41:50]

what is this? why is it not used?

[boliu, 2014/06/16 22:43:27]

Ehh...I think I dropped this accidentally.

So when functor is called, frameworks gives us a clip, which is a rectangle. But
if the view is rotated in 3d, the "clip" isn't a rectangle, in which case
framework should set the stencil properly before calling us, and we tell the
compositor to use the existing stencil. It's an edge case that's clearly been
broken accidentally for a few months and no one noticed...

Right now, we should do it in the parent compositor now, which is here. This
means plumbing in SyncCompositor can be removed again :)

Going to fix this first separately before landing this.

                               int framebuffer_binding_ext,
-                              AwDrawGLInfo* draw_info,
-                              DrawGLResult* result) {
+                              AwDrawGLInfo* draw_info) {
   TRACE_EVENT0("android_webview", "HardwareRenderer::DrawGL");
 
   // We need to watch if the current Android context has changed and enforce