Content Shell: Introduce LayoutTestBrowserContext. (Reland)

content/shell/browser/shell_browser_main_parts.cc

Index: content/shell/browser/shell_browser_main_parts.cc
diff --git a/content/shell/browser/shell_browser_main_parts.cc b/content/shell/browser/shell_browser_main_parts.cc
index d6a067f5cae5cabd03e88fb0e776270204e6d3c1..bf24cd18f09574fb5e5e4f8f8760f54ae57ff79d 100644
--- a/content/shell/browser/shell_browser_main_parts.cc
+++ b/content/shell/browser/shell_browser_main_parts.cc
@@ -16,6 +16,7 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/url_constants.h"
+#include "content/shell/browser/layout_test/layout_test_browser_context.h"
 #include "content/shell/browser/shell.h"
 #include "content/shell/browser/shell_browser_context.h"
 #include "content/shell/browser/shell_devtools_delegate.h"
@@ -128,9 +129,15 @@ void ShellBrowserMainParts::PreMainMessageLoopRun() {
   }
 #endif
   net_log_.reset(new ShellNetLog("content_shell"));
-  browser_context_.reset(new ShellBrowserContext(false, net_log_.get()));
-  off_the_record_browser_context_.reset(
-      new ShellBrowserContext(true, net_log_.get()));
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDumpRenderTree)) {
+    browser_context_.reset(new LayoutTestBrowserContext(false, net_log_.get()));
+    off_the_record_browser_context_.reset(
+        new LayoutTestBrowserContext(true, net_log_.get()));
+  } else {
+    browser_context_.reset(new ShellBrowserContext(false, net_log_.get()));
+    off_the_record_browser_context_.reset(
+        new ShellBrowserContext(true, net_log_.get()));
+  }
 
   Shell::Initialize();
   net::NetModule::SetResourceProvider(PlatformResourceProvider);