Adds link disambiguation popup support to Windows.

content/browser/web_contents/web_contents_view_aura.cc

Index: content/browser/web_contents/web_contents_view_aura.cc
diff --git a/content/browser/web_contents/web_contents_view_aura.cc b/content/browser/web_contents/web_contents_view_aura.cc
index 63bd454bd6de08cf4dea78aac6a90449c24ed659..85dc8f306d62e6813ab8282c5a7797aeff2654f2 100644
--- a/content/browser/web_contents/web_contents_view_aura.cc
+++ b/content/browser/web_contents/web_contents_view_aura.cc
@@ -19,6 +19,7 @@
 #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/render_widget_host_view_aura.h"
+#include "content/browser/renderer_host/web_input_event_aura.h"
 #include "content/browser/web_contents/aura/gesture_nav_simple.h"
 #include "content/browser/web_contents/aura/image_window_delegate.h"
 #include "content/browser/web_contents/aura/overscroll_navigation_overlay.h"
@@ -45,6 +46,7 @@
 #include "net/base/filename_util.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/aura/client/aura_constants.h"
+#include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/client/window_tree_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
@@ -802,7 +804,7 @@ void WebContentsViewAura::InstallOverscrollControllerDelegate(
 void WebContentsViewAura::PrepareOverscrollWindow() {
   // If there is an existing |overscroll_window_| which is in the middle of an
   // animation, then destroying the window here causes the animation to be
-  // completed immidiately, which triggers |OnImplicitAnimationsCompleted()|
+  // completed immediately, which triggers |OnImplicitAnimationsCompleted()|
   // callback, and that tries to reset |overscroll_window_| again, causing a
   // double-free. So use a temporary variable here.
   if (overscroll_window_) {
@@ -980,6 +982,22 @@ void WebContentsViewAura::OverscrollUpdateForWebContentsDelegate(int delta_y) {
     web_contents_->GetDelegate()->OverscrollUpdate(delta_y);
 }
 
+void WebContentsViewAura::ProcessLinkDisambiguationGesture(
+    ui::GestureEvent* event) {
+  blink::WebGestureEvent web_gesture = content::MakeWebGestureEvent(event);
+  // If we fail to make a WebGestureEvent that is a Tap from the provided event,
+  // don't forward it to Blink.
+  if (web_gesture.type < blink::WebInputEvent::Type::GestureTap ||
+      web_gesture.type > blink::WebInputEvent::Type::GestureTapCancel)
+    return;
+
+  RenderWidgetHostViewAura* rwhva = ToRenderWidgetHostViewAura(
+      web_contents_->GetRenderWidgetHostView());
+  RenderWidgetHostImpl* host = RenderWidgetHostImpl::From(
+      rwhva->GetRenderWidgetHost());
+  host->ForwardGestureEvent(web_gesture);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsViewAura, WebContentsView implementation:
 
@@ -1456,6 +1474,28 @@ bool WebContentsViewAura::HasHitTestMask() const {
 void WebContentsViewAura::GetHitTestMask(gfx::Path* mask) const {
 }
 
+void WebContentsViewAura::OnLinkDisambiguationPopupRequested(
+    const gfx::Rect& target_rect, const SkBitmap& zoomed_bitmap) {
+  // |target_rect| is provided in pixels, not DIPs. So we convert it to DIPs
+  // by dividing by the device scale factor.
+  gfx::Screen* screen = gfx::Screen::GetScreenFor(window_.get());
+  if (!screen) return;
+  float device_scale_factor = screen->GetDisplayNearestWindow(
+      window_.get()).device_scale_factor();
+  gfx::RectF screen_target_rect_f(target_rect);
+  screen_target_rect_f.Scale(1.0f / device_scale_factor);
+  gfx::Rect screen_target_rect(gfx::ToEnclosingRect(screen_target_rect_f));
+
+  if (delegate_) {
+    delegate_->ShowLinkDisambiguationPopup(
+        screen_target_rect,
+        zoomed_bitmap,
+        window_.get(),
+        base::Bind(&WebContentsViewAura::ProcessLinkDisambiguationGesture,
+            base::Unretained(this)));
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsViewAura, ui::EventHandler implementation: