[Sharesheet] Give Sharesheet rounded corners

Bug: 1097623
Change-Id: I3b09b083884924c21f87e02d24900b8e17d12615
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2308433Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Melissa Zhang <melzhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790605}

chrome/browser/ui/views/sharesheet_bubble_view.cc

@@ -4,6 +4,7 @@
 
 #include "chrome/browser/ui/views/sharesheet_bubble_view.h"
 
+#include <memory>
 #include <utility>
 
 #include "base/strings/string16.h"
@@ -14,6 +15,8 @@
 #include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/image/image_skia.h"
+#include "ui/views/bubble/bubble_border.h"
+#include "ui/views/bubble/bubble_frame_view.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/button/image_button_factory.h"
 #include "ui/views/controls/image_view.h"
@@ -25,6 +28,7 @@
 namespace {
 
 constexpr int kButtonSize = 64;
+constexpr int kCornerRadius = 12;
 constexpr int kMaxTargetRowSize = 4;
 constexpr int kSpacing = 24;
 constexpr char kTitle[] = "Share";
@@ -187,6 +191,18 @@ void SharesheetBubbleView::ButtonPressed(views::Button* sender,
   RequestFocus();
 }
 
+std::unique_ptr<views::NonClientFrameView>
+SharesheetBubbleView::CreateNonClientFrameView(views::Widget* widget) {
+  auto bubble_border =
+      std::make_unique<views::BubbleBorder>(arrow(), GetShadow(), color());
+  bubble_border->SetCornerRadius(kCornerRadius);
+  auto frame =
+      views::BubbleDialogDelegateView::CreateNonClientFrameView(widget);
+  static_cast<views::BubbleFrameView*>(frame.get())
+      ->SetBubbleBorder(std::move(bubble_border));
+  return frame;
+}
+
 void SharesheetBubbleView::OnWidgetDestroyed(views::Widget* widget) {
   delegate_->OnBubbleClosed(active_target_);
 }

chrome/browser/ui/views/sharesheet_bubble_view.h

@@ -33,6 +33,10 @@ class SharesheetBubbleView : public views::BubbleDialogDelegateView,
   // views::ButtonListener overrides
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
+  // views::WidgetDelegate override
+  std::unique_ptr<views::NonClientFrameView> CreateNonClientFrameView(
+      views::Widget* widget) override;
+
   // views::BubbleDialogDelegateView overrides
   gfx::Size CalculatePreferredSize() const override;
   void OnWidgetDestroyed(views::Widget* widget) override;