Support link hovering.

mash/browser/browser.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mash/browser/browser.h"
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string16.h"
@@ skipping 134 matching lines @@
     reload_button_->set_request_focus_on_press(false);
     AddChildView(back_button_);
     AddChildView(forward_button_);
     AddChildView(reload_button_);
     AddChildView(prompt_);
     AddChildView(debug_button_);
     AddChildView(throbber_);
     AddChildView(progress_bar_);
     AddChildView(debug_view_);
     debug_view_->set_view(view_.get());
+    view_->SetResizerSize(gfx::Size(16, 16));
   }
   ~UI() override { browser_->RemoveWindow(GetWidget()); }
 
   void NavigateTo(const GURL& url) { view_->NavigateTo(url); }
 
  private:
   // Overridden from views::WidgetDelegate:
   views::View* GetContentsView() override { return this; }
   base::string16 GetWindowTitle() const override {
     // TODO(beng): use resources.
@@ skipping 121 matching lines @@
       throbber_->Stop();
       progress_bar_->SetProgress(0.f);
     }
   }
   void NavigationStateChanged(const GURL& url,
                               const mojo::String& title,
                               bool can_go_back,
                               bool can_go_forward) override {
     EnableButton(back_button_, can_go_back);
     EnableButton(forward_button_, can_go_forward);
-    prompt_->SetText(base::UTF8ToUTF16(url.spec()));
+    current_url_ = url;
+    prompt_->SetText(base::UTF8ToUTF16(current_url_.spec()));
     current_title_ = base::UTF8ToUTF16(title.get());
     GetWidget()->UpdateWindowTitle();
   }
   void LoadProgressChanged(double progress) override {
     progress_bar_->SetProgress(progress);
   }
+  void UpdateHoverURL(const GURL& url) override {
+    if (url.is_valid())
+      prompt_->SetText(base::UTF8ToUTF16(url.spec()));
+    else
+      prompt_->SetText(base::UTF8ToUTF16(current_url_.spec()));
+  }
   void ViewCreated(navigation::mojom::ViewPtr view,
                    navigation::mojom::ViewClientRequest request,
                    bool is_popup,
                    const gfx::Rect& initial_rect,
                    bool user_gesture) override {
     views::Widget* window = views::Widget::CreateWindowWithContextAndBounds(
         new UI(browser_, is_popup ? UI::Type::POPUP : UI::Type::WINDOW,
                std::move(view), std::move(request)),
         nullptr, initial_rect);
     window->Show();
@@ skipping 20 matching lines @@
 
   mus::Window* content_area_ = nullptr;
 
   DebugView* debug_view_;
 
   navigation::mojom::ViewPtr view_;
   mojo::Binding<navigation::mojom::ViewClient> view_client_binding_;
 
   bool is_loading_ = false;
   base::string16 current_title_;
+  GURL current_url_;
 
   bool showing_debug_view_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(UI);
 };
 
 Browser::Browser() {}
 Browser::~Browser() {}
 
 void Browser::AddWindow(views::Widget* window) {
@@ skipping 47 matching lines @@
   AddWindow(window);
 }
 
 void Browser::Create(shell::Connection* connection,
                      mojom::LaunchableRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 }  // namespace browser
 }  // namespace mash