Cancel composition on RenderWidgetHostCocoaView after a child frame's RWHV receives the correspondi…

content/browser/renderer_host/render_widget_host_view_mac_unittest.mm

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include <Cocoa/Cocoa.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <tuple>
@@ skipping 1235 matching lines @@
   // Send an initial wheel event for scrolling by 3 lines.
   // Verify that Event.Latency.OS.MOUSE_WHEEL histogram is computed properly.
   NSEvent* wheelEvent = MockScrollWheelEventWithPhase(@selector(phaseBegan),3);
   [view->cocoa_view() scrollWheel:wheelEvent];
   histogram_tester.ExpectTotalCount("Event.Latency.OS.MOUSE_WHEEL", 1);
 
   // Clean up.
   host->ShutdownAndDestroyWidget(true);
 }
 
+// This test creates a test view to mimic a child frame's view and verifies that
+// calling ImeCancelComposition on either the child view or the tab's view will
+// always lead to a call to cancelComposition on the cocoa view.
+TEST_F(RenderWidgetHostViewMacTest, ImeCancelCompositionForAllViews) {
+  TestRenderWidgetHostView* child_view =
+      new TestRenderWidgetHostView(rvh()->GetWidget());
+  // Set the marked test on cocoa view.
+  NSString* text = [[NSString alloc] initWithString:@"sample text"];
+  NSRange selectedRange = NSMakeRange(0, 1);
+  NSRange replacementRange = NSMakeRange(0, 1);
+  // Make Cocoa view assume there is marked text.
+  [rwhv_cocoa_ setMarkedText:text
+               selectedRange:selectedRange
+            replacementRange:replacementRange];
+  EXPECT_TRUE([rwhv_cocoa_ hasMarkedText]);
+  child_view->ImeCancelComposition();
+  EXPECT_FALSE([rwhv_cocoa_ hasMarkedText]);
+
+  // Repeat for the tab's view.
+  [rwhv_cocoa_ setMarkedText:text
+               selectedRange:selectedRange
+            replacementRange:replacementRange];
+  EXPECT_TRUE([rwhv_cocoa_ hasMarkedText]);
+  rwhv_mac_->ImeCancelComposition();
+  EXPECT_FALSE([rwhv_cocoa_ hasMarkedText]);
+}
+
 }  // namespace content