views::Textfield: Implement yank editing command.

ui/views/cocoa/bridged_native_widget_unittest.mm

Index: ui/views/cocoa/bridged_native_widget_unittest.mm
diff --git a/ui/views/cocoa/bridged_native_widget_unittest.mm b/ui/views/cocoa/bridged_native_widget_unittest.mm
index 416cfbcc478c4ef155128b73b34f145d40e4d4a0..0c44c5083197dd5da928d78943d1df193f983d55 100644
--- a/ui/views/cocoa/bridged_native_widget_unittest.mm
+++ b/ui/views/cocoa/bridged_native_widget_unittest.mm
@@ -482,6 +482,12 @@ void BridgedNativeWidgetTest::TestDeleteBeginning(SEL sel) {
   EXPECT_NSEQ_3(@" bar ", GetExpectedText(), GetActualText());
   EXPECT_EQ_RANGE_3(NSMakeRange(5, 0), GetExpectedSelectionRange(),
                     GetActualSelectionRange());
+
+  // Verify yanking inserts the deleted text.
+  PerformCommand(@selector(yank:));
+  EXPECT_NSEQ_3(@" bar baz", GetExpectedText(), GetActualText());
+  EXPECT_EQ_RANGE_3(NSMakeRange(8, 0), GetExpectedSelectionRange(),
+                    GetActualSelectionRange());
 }
 
 void BridgedNativeWidgetTest::TestDeleteEnd(SEL sel) {
@@ -510,6 +516,12 @@ void BridgedNativeWidgetTest::TestDeleteEnd(SEL sel) {
   EXPECT_NSEQ_3(@"bar", GetExpectedText(), GetActualText());
   EXPECT_EQ_RANGE_3(NSMakeRange(0, 0), GetExpectedSelectionRange(),
                     GetActualSelectionRange());
+
+  // Verify yanking inserts the deleted text.
+  PerformCommand(@selector(yank:));
+  EXPECT_NSEQ_3(@"foo bar", GetExpectedText(), GetActualText());
+  EXPECT_EQ_RANGE_3(NSMakeRange(4, 0), GetExpectedSelectionRange(),
+                    GetActualSelectionRange());
 }
 
 void BridgedNativeWidgetTest::TestEditingCommands(NSArray* selectors) {
@@ -896,6 +908,12 @@ TEST_F(BridgedNativeWidgetTest, TextInput_DeleteBackward) {
   EXPECT_EQ_RANGE_3(NSMakeRange(0, 0), GetExpectedSelectionRange(),
                     GetActualSelectionRange());
 
+  // Verify that deletion did not modify the kill buffer.
+  PerformCommand(@selector(yank:));
+  EXPECT_NSEQ_3(nil, GetExpectedText(), GetActualText());
+  EXPECT_EQ_RANGE_3(NSMakeRange(0, 0), GetExpectedSelectionRange(),
+                    GetActualSelectionRange());
+
   // Try to delete again on an empty string.
   PerformCommand(@selector(deleteBackward:));
   EXPECT_NSEQ_3(nil, GetExpectedText(), GetActualText());
@@ -921,6 +939,12 @@ TEST_F(BridgedNativeWidgetTest, TextInput_DeleteForward) {
   EXPECT_NSEQ_3(nil, GetExpectedText(), GetActualText());
   EXPECT_EQ_RANGE_3(NSMakeRange(0, 0), GetExpectedSelectionRange(),
                     GetActualSelectionRange());
+
+  // Verify that deletion did not modify the kill buffer.
+  PerformCommand(@selector(yank:));
+  EXPECT_NSEQ_3(nil, GetExpectedText(), GetActualText());
+  EXPECT_EQ_RANGE_3(NSMakeRange(0, 0), GetExpectedSelectionRange(),
+                    GetActualSelectionRange());
 }
 
 // Test forward word deletion using text input protocol.
@@ -950,6 +974,12 @@ TEST_F(BridgedNativeWidgetTest, TextInput_DeleteWordForward) {
   EXPECT_NSEQ_3(@"o b baz", GetExpectedText(), GetActualText());
   EXPECT_EQ_RANGE_3(NSMakeRange(0, 0), GetExpectedSelectionRange(),
                     GetActualSelectionRange());
+
+  // Verify that deletion did not modify the kill buffer.
+  PerformCommand(@selector(yank:));
+  EXPECT_NSEQ_3(@"o b baz", GetExpectedText(), GetActualText());
+  EXPECT_EQ_RANGE_3(NSMakeRange(0, 0), GetExpectedSelectionRange(),
+                    GetActualSelectionRange());
 }
 
 // Test backward word deletion using text input protocol.
@@ -981,6 +1011,12 @@ TEST_F(BridgedNativeWidgetTest, TextInput_DeleteWordBackward) {
   EXPECT_NSEQ_3(@"faz", GetExpectedText(), GetActualText());
   EXPECT_EQ_RANGE_3(NSMakeRange(1, 0), GetExpectedSelectionRange(),
                     GetActualSelectionRange());
+
+  // Verify that deletion did not modify the kill buffer.
+  PerformCommand(@selector(yank:));
+  EXPECT_NSEQ_3(@"faz", GetExpectedText(), GetActualText());
+  EXPECT_EQ_RANGE_3(NSMakeRange(1, 0), GetExpectedSelectionRange(),
+                    GetActualSelectionRange());
 }
 
 // Test deleting to beginning/end of line/paragraph using text input protocol.