Restore the collapsed spaces of the text when we copy it

content/renderer/render_view_browsertest.cc

 // 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 <stddef.h>
 #include <stdint.h>
 #include <tuple>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 1714 matching lines @@
           view()->webview()->findFrameByName("frame")));
   subframe->Navigate(common_params, StartNavigationParams(), request_params);
   FrameLoadWaiter(subframe).Wait();
 
   // Copy the document content to std::wstring and compare with the
   // expected result.
   const int kMaxOutputCharacters = 256;
   std::string output = base::UTF16ToUTF8(
       base::StringPiece16(WebFrameContentDumper::dumpWebViewAsText(
           view()->GetWebView(), kMaxOutputCharacters)));
-  EXPECT_EQ(output, "hello \n\nworld");
+  EXPECT_EQ(output, "hello  \n\nworld");
 }
 
 // This test ensures that a RenderFrame object is created for the top level
 // frame in the RenderView.
 TEST_F(RenderViewImplTest, BasicRenderFrame) {
   EXPECT_TRUE(view()->main_render_frame_);
 }
 
 TEST_F(RenderViewImplTest, MessageOrderInDidChangeSelection) {
   LoadHTML("<textarea id=\"test\"></textarea>");
@@ skipping 734 matching lines @@
   ExpectPauseAndResume(3);
   blink::WebScriptSource source2(
       WebString::fromUTF8("function func2() { func1(); }; func2();"));
   frame()->GetWebFrame()->executeScriptInIsolatedWorld(17, &source2, 1, 1);
 
   EXPECT_FALSE(IsPaused());
   Detach();
 }
 
 }  // namespace content