Don't bother layout until first navigation is done.

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 "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 1418 matching lines @@
     // Write the values of its DOM 'dir' attribute and its CSS 'direction'
     // property to the <div> element.
     ExecuteJavaScriptForTests(
         "var result = document.getElementById('result');"
         "var node = document.getElementById('test');"
         "var style = getComputedStyle(node, null);"
         "result.innerText ="
         "    node.getAttribute('dir') + ',' +"
         "    style.getPropertyValue('direction');");
 
+    // Required to see any updates in dumpFrameTreeAsText.
+    view()->GetWebView()->updateAllLifecyclePhases();
+
     // Copy the document content to std::wstring and compare with the
     // expected result.
     const int kMaxOutputCharacters = 16;
     base::string16 output = WebFrameContentDumper::dumpFrameTreeAsText(
         GetMainFrame(), kMaxOutputCharacters);
     EXPECT_EQ(base::WideToUTF16(kTextDirection[i].expected_result), output);
   }
 }
 
 // Test that we can receive correct DOM events when we send input events
@@ skipping 120 matching lines @@
                        sizeof(expected_result),
                        "\n"       // texts in the <input> element
                        "%d,%s\n"  // texts in the first <div> element
                        "%d,%s\n"  // texts in the second <div> element
                        "%d,%s",   // texts in the third <div> element
                        key_code, kModifierData[j].expected_result,
                        static_cast<int>(char_code[0]),
                        kModifierData[j].expected_result,
                        key_code, kModifierData[j].expected_result);
 
+        // Required to see any updates in dumpFrameTreeAsText.
+        view()->GetWebView()->updateAllLifecyclePhases();
+
         // Retrieve the text in the test page and compare it with the expected
         // text created from a virtual-key code, a character code, and the
         // modifier-key status.
         const int kMaxOutputCharacters = 1024;
         std::string output = base::UTF16ToUTF8(
             base::StringPiece16(WebFrameContentDumper::dumpFrameTreeAsText(
                 GetMainFrame(), kMaxOutputCharacters)));
         EXPECT_EQ(expected_result, output);
       }
     }
@@ skipping 1204 matching lines @@
       FROM_HERE,
       base::Bind(&DevToolsAgentTest::CloseWhilePaused, base::Unretained(this)));
   ExecuteJavaScriptForTests("debugger;");
 
   // CloseWhilePaused should resume execution and continue here.
   EXPECT_FALSE(IsPaused());
   Detach();
 }
 
 }  // namespace content