[OLD ATTEMPT, DO NOT REVIEW] mustash: Enable connections to mus from the Chrome renderer

content/browser/renderer_host/render_widget_host_view_mus.cc

Index: content/browser/renderer_host/render_widget_host_view_mus.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_mus.cc b/content/browser/renderer_host/render_widget_host_view_mus.cc
index e3710354421139cd1eec7483f6e329692625df93..aa5ce73e7c2c35de13a3aac7db575179d6a501ce 100644
--- a/content/browser/renderer_host/render_widget_host_view_mus.cc
+++ b/content/browser/renderer_host/render_widget_host_view_mus.cc
@@ -4,7 +4,13 @@
 
 #include "content/browser/renderer_host/render_widget_host_view_mus.h"
 
+#include "components/mus/public/cpp/window.h"
+#include "components/mus/public/cpp/window_tree_connection.h"
+#include "content/browser/mojo/mojo_shell_client_host.h"
+#include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/public/common/mojo_shell_connection.h"
+#include "mojo/application/public/cpp/application_impl.h"
 
 namespace blink {
 struct WebScreenInfo;
@@ -13,9 +19,16 @@ struct WebScreenInfo;
 namespace content {
 
 RenderWidgetHostViewMus::RenderWidgetHostViewMus(
+    mus::Window* parent_window,
     RenderWidgetHostImpl* host,
     base::WeakPtr<RenderWidgetHostViewBase> platform_view)
     : host_(host), platform_view_(platform_view) {
+  DCHECK(parent_window);
+  mus::Window* window = parent_window->connection()->NewWindow();
+  window->SetVisible(true);
+  window->SetBounds(parent_window->bounds());
+  parent_window->AddChild(window);
+  window_.reset(new mus::ScopedWindowPtr(window));
   host_->SetView(this);
 }
 
@@ -36,18 +49,21 @@ bool RenderWidgetHostViewMus::IsShowing() {
 }
 
 void RenderWidgetHostViewMus::SetSize(const gfx::Size& size) {
-  size_ = size;
-  host_->WasResized();
+  gfx::Rect bounds = window_->window()->bounds();
+  bounds.set_size(size);
+  SetBounds(bounds);
 }
 
 void RenderWidgetHostViewMus::SetBounds(const gfx::Rect& rect) {
-  SetSize(rect.size());
+  window_->window()->SetBounds(rect);
+  host_->WasResized();
 }
 
 void RenderWidgetHostViewMus::Focus() {
   // TODO(fsamuel): Request focus for the associated Mus::Window
   // We need to be careful how we propagate focus as we navigate to and
   // from interstitials.
+  window_->window()->SetFocus();
 }
 
 bool RenderWidgetHostViewMus::HasFocus() const {
@@ -60,7 +76,7 @@ bool RenderWidgetHostViewMus::IsSurfaceAvailableForCopy() const {
 }
 
 gfx::Rect RenderWidgetHostViewMus::GetViewBounds() const {
-  return gfx::Rect(size_);
+  return window_->window()->bounds();
 }
 
 gfx::Vector2dF RenderWidgetHostViewMus::GetLastScrollOffset() const {
@@ -91,6 +107,11 @@ void RenderWidgetHostViewMus::SetTooltipText(
   // TOOD(fsamuel): Ask window manager for tooltip?
 }
 
+void RenderWidgetHostViewMus::EmbedWindowTreeClient(
+    mus::mojom::WindowTreeClientPtr tree_client) {
+  window_->window()->Embed(tree_client.Pass());
+}
+
 void RenderWidgetHostViewMus::InitAsChild(gfx::NativeView parent_view) {
   platform_view_->InitAsChild(parent_view);
 }
@@ -99,6 +120,10 @@ RenderWidgetHost* RenderWidgetHostViewMus::GetRenderWidgetHost() const {
   return host_;
 }
 
+bool RenderWidgetHostViewMus::IsMusView() const {
+  return true;
+}
+
 void RenderWidgetHostViewMus::InitAsPopup(
     RenderWidgetHostView* parent_host_view,
     const gfx::Rect& bounds) {
@@ -111,11 +136,11 @@ void RenderWidgetHostViewMus::InitAsFullscreen(
 }
 
 gfx::NativeView RenderWidgetHostViewMus::GetNativeView() const {
-  return gfx::NativeView();
+  return platform_view_->GetNativeView();
 }
 
 gfx::NativeViewId RenderWidgetHostViewMus::GetNativeViewId() const {
-  return gfx::NativeViewId();
+  return platform_view_->GetNativeViewId();
 }
 
 gfx::NativeViewAccessible RenderWidgetHostViewMus::GetNativeViewAccessible() {
@@ -212,7 +237,7 @@ bool RenderWidgetHostViewMus::GetScreenColorProfile(
 }
 
 gfx::Rect RenderWidgetHostViewMus::GetBoundsInRootWindow() {
-  return GetViewBounds();
+  return platform_view_->GetBoundsInRootWindow();
 }
 
 #if defined(OS_MACOSX)