Adds link disambiguation popup support to Windows.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index eee2df69b76756f82a597511cb8b934f22227e9e..8a249cfc8e948aa3e9102b3931da048e2beb3867 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -29,6 +29,7 @@
 #include "content/browser/renderer_host/input/synthetic_gesture_target_aura.h"
 #include "content/browser/renderer_host/overscroll_controller.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
+#include "content/browser/renderer_host/render_view_host_delegate_view.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/ui_events_helper.h"
@@ -1224,6 +1225,59 @@ gfx::GLSurfaceHandle RenderWidgetHostViewAura::GetCompositingSurface() {
   return ImageTransportFactory::GetInstance()->GetSharedSurfaceHandle();
 }
 
+#if defined(OS_WIN)

[sky, 2014/08/04 20:05:20]

No ifdef here.

[luken, 2014/09/11 01:07:27]

Done.

+void RenderWidgetHostViewAura::ShowDisambiguationPopup(
+    const gfx::Rect& target_rect,
+    const SkBitmap& zoomed_bitmap) {
+  // |target_rect| is provided in pixels, not DIPs. So we convert it to DIPs
+  // by scaling it by the inverse of the device scale factor.
+  gfx::RectF screen_target_rect_f(target_rect);
+  screen_target_rect_f.Scale(1.0f / current_device_scale_factor_);
+  disambiguation_target_rect_ = gfx::ToEnclosingRect(screen_target_rect_f);
+
+  float scale = static_cast<float>(zoomed_bitmap.width()) /
+                static_cast<float>(target_rect.width());
+  gfx::Size zoomed_size(gfx::ToCeiledSize(
+      gfx::ScaleSize(disambiguation_target_rect_.size(), scale)));
+
+  CopyFromCompositingSurface(

[sky, 2014/08/04 20:05:20]

If this is async, how do you need it completes before anything interesting
happens (including this being deleted)?

[luken, 2014/09/11 01:07:27]

I switched over to a weak this pointer. If this view has been deleted there's no
need to show the disambiguation popup.

+      disambiguation_target_rect_,
+      zoomed_size,
+      base::Bind(&RenderWidgetHostViewAura::DisambiguationPopupRendered,
+                 base::Unretained(this)),
+      kN32_SkColorType);
+}
+
+void RenderWidgetHostViewAura::DisambiguationPopupRendered(
+    bool success,
+    const SkBitmap& result) {
+  if (!success)
+    return;
+
+  // Use RenderViewHostDelegate to get to the WebContentsViewAura, which will
+  // actually show the delegate.
+  RenderViewHostDelegate* delegate = NULL;
+  if (host_->IsRenderView())
+    delegate = RenderViewHost::From(host_)->GetDelegate();
+  RenderViewHostDelegateView* delegate_view = NULL;
+  if (delegate)
+    delegate_view = delegate->GetDelegateView();
+  if (delegate_view)
+    delegate_view->ShowDisambiguationPopup(disambiguation_target_rect_, result);
+}
+
+void RenderWidgetHostViewAura::HideDisambiguationPopup() {
+  RenderViewHostDelegate* delegate = NULL;
+  if (host_->IsRenderView())
+    delegate = RenderViewHost::From(host_)->GetDelegate();
+  RenderViewHostDelegateView* delegate_view = NULL;
+  if (delegate)
+    delegate_view = delegate->GetDelegateView();
+  if (delegate_view)
+    delegate_view->HideDisambiguationPopup();
+}
+#endif
+
 bool RenderWidgetHostViewAura::LockMouse() {
   aura::Window* root_window = window_->GetRootWindow();
   if (!root_window)
@@ -1839,6 +1893,9 @@ void RenderWidgetHostViewAura::OnMouseEvent(ui::MouseEvent* event) {
                         DismissOwnedPopups,
                         reinterpret_cast<LPARAM>(toplevel_hwnd));
     }
+    // The Disambiguation popup does not parent itself from this window, so we
+    // manually dismiss it.
+    HideDisambiguationPopup();
 #endif
     blink::WebMouseWheelEvent mouse_wheel_event =
         MakeWebMouseWheelEvent(static_cast<ui::MouseWheelEvent*>(event));