capture_mode: Copy image to clipboard

BUG=1116137
TEST=Manual

Change-Id: Ifdf59fb05064b8902a3d8562f8523c2b186c6b4c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2393014
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805015}

ash/capture_mode/capture_mode_controller.cc

@@ -26,6 +26,8 @@
 #include "base/task/thread_pool.h"
 #include "base/time/time.h"
 #include "components/prefs/pref_service.h"
+#include "ui/base/clipboard/clipboard_data.h"
+#include "ui/base/clipboard/clipboard_non_backed.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/public/cpp/notification.h"
@@ -168,6 +170,15 @@ void ShowFailureNotification() {
       /*optional_fields=*/{}, /*delegate=*/nullptr);
 }
 
+// Copies the bitmap representation of the given |image| to the clipboard.
+void CopyImageToClipboard(const gfx::Image& image) {
+  auto* clipboard = ui::ClipboardNonBacked::GetForCurrentThread();
+  DCHECK(clipboard);
+  auto clipboard_data = std::make_unique<ui::ClipboardData>();
+  clipboard_data->SetBitmapData(image.AsBitmap());
+  clipboard->WriteClipboardData(std::move(clipboard_data));
+}
+
 }  // namespace
 
 CaptureModeController::CaptureModeController(
@@ -337,8 +348,9 @@ void CaptureModeController::OnImageFileSaved(
   }
 
   DCHECK(png_bytes && png_bytes->size());
-  // TODO(afakhry): Save image to clipboard.
-  ShowPreviewNotification(path, gfx::Image::CreateFrom1xPNGBytes(png_bytes));
+  const auto image = gfx::Image::CreateFrom1xPNGBytes(png_bytes);
+  CopyImageToClipboard(image);
+  ShowPreviewNotification(path, image);
 }
 
 void CaptureModeController::ShowPreviewNotification(

ash/capture_mode/capture_mode_controller.h

@@ -90,8 +90,9 @@ class ASH_EXPORT CaptureModeController {
   // Called back when an attempt to save the image file has been completed, with
   // |success| indicating whether the attempt succeeded for failed. |png_bytes|
   // is the buffer containing the captured image in a PNG format, which will be
-  // used to show a preview of the image in a notification. If saving was
-  // successful, then the image was saved in |path|.
+  // used to show a preview of the image in a notification, and save it as a
+  // bitmap in the clipboard. If saving was successful, then the image was saved
+  // in |path|.
   void OnImageFileSaved(scoped_refptr<base::RefCountedMemory> png_bytes,
                         const base::FilePath& path,
                         bool success);