Add --dump-line-box-trees parameter to content_shell.

content/shell/renderer/layout_test/blink_test_runner.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 "content/shell/renderer/layout_test/blink_test_runner.h"
 
 #include <algorithm>
 #include <clocale>
 #include <cmath>
 
@@ skipping 766 matching lines @@
 void BlinkTestRunner::CaptureDump() {
   test_runner::WebTestInterfaces* interfaces =
       LayoutTestRenderProcessObserver::GetInstance()->test_interfaces();
   TRACE_EVENT0("shell", "BlinkTestRunner::CaptureDump");
 
   if (interfaces->TestRunner()->ShouldDumpAsAudio()) {
     std::vector<unsigned char> vector_data;
     interfaces->TestRunner()->GetAudioData(&vector_data);
     Send(new ShellViewHostMsg_AudioDump(routing_id(), vector_data));
   } else {
-    Send(new ShellViewHostMsg_TextDump(routing_id(),
-                                       proxy()->CaptureTree(false)));
+      const base::CommandLine& command_line =
+          *base::CommandLine::ForCurrentProcess();
+    Send(new ShellViewHostMsg_TextDump(
+        routing_id(), proxy()->CaptureTree(
+            false, command_line.HasSwitch(switches::kDumpLineBoxTrees))));
 
     if (test_config_.enable_pixel_dumping &&
         interfaces->TestRunner()->ShouldGeneratePixelResults()) {
       CHECK(render_view()->GetWebView()->isAcceleratedCompositingActive());
       proxy()->CapturePixelsAsync(base::Bind(
           &BlinkTestRunner::CaptureDumpPixels, base::Unretained(this)));
       return;
     }
   }
 
@@ skipping 93 matching lines @@
 
   leak_detector_->TryLeakDetection(main_frame);
 }
 
 void BlinkTestRunner::ReportLeakDetectionResult(
     const LeakDetectionResult& report) {
   Send(new ShellViewHostMsg_LeakDetectionDone(routing_id(), report));
 }
 
 }  // namespace content