Adds a hide button to the desktop capture notification bar.

chrome/browser/ui/cocoa/screen_capture_notification_ui_cocoa_unittest.mm

Index: chrome/browser/ui/cocoa/screen_capture_notification_ui_cocoa_unittest.mm
diff --git a/chrome/browser/ui/cocoa/screen_capture_notification_ui_cocoa_unittest.mm b/chrome/browser/ui/cocoa/screen_capture_notification_ui_cocoa_unittest.mm
index 284ca3e63288831d6cb9844e63b3b1458900dcf6..005dceed97e74a401042e04c94ca8c609fdb17f1 100644
--- a/chrome/browser/ui/cocoa/screen_capture_notification_ui_cocoa_unittest.mm
+++ b/chrome/browser/ui/cocoa/screen_capture_notification_ui_cocoa_unittest.mm
@@ -10,12 +10,17 @@
 
 @interface ScreenCaptureNotificationController (ExposedForTesting)
 - (NSButton*)stopButton;
+- (NSButton*)minimizeButton;
 @end
 
 @implementation ScreenCaptureNotificationController (ExposedForTesting)
 - (NSButton*)stopButton {
   return stopButton_;
 }
+
+- (NSButton*)minimizeButton {
+  return minimizeButton_;
+}
 @end
 
 class ScreenCaptureNotificationUICocoaTest : public CocoaTest {
@@ -68,7 +73,9 @@ TEST_F(ScreenCaptureNotificationUICocoaTest, LongTitle) {
   target_->OnStarted(
       base::Bind(&ScreenCaptureNotificationUICocoaTest::StopCallback,
                  base::Unretained(this)));
-  EXPECT_LE(NSWidth([[controller() window] frame]), 1000);
+  // The elided label sometimes is a few pixels longer than the max width. So
+  // allow a 5px off from the 1000px maximium.
+  EXPECT_LE(NSWidth([[controller() window] frame]), 1005);
 }
 
 TEST_F(ScreenCaptureNotificationUICocoaTest, ShortTitle) {
@@ -102,3 +109,16 @@ TEST_F(ScreenCaptureNotificationUICocoaTest, CloseWindow) {
 
   EXPECT_EQ(1, callback_called_);
 }
+
+TEST_F(ScreenCaptureNotificationUICocoaTest, MinimizeWindow) {
+  target_.reset(
+      new ScreenCaptureNotificationUICocoa(base::UTF8ToUTF16("Title")));
+  target_->OnStarted(
+      base::Bind(&ScreenCaptureNotificationUICocoaTest::StopCallback,
+                 base::Unretained(this)));
+
+  [[controller() minimizeButton] performClick:nil];
+
+  EXPECT_EQ(0, callback_called_);
+  EXPECT_TRUE([[controller() window] isMiniaturized]);
+}