Move unique name generation and tracking into //content.

content/shell/test_runner/web_frame_test_client.cc

Index: content/shell/test_runner/web_frame_test_client.cc
diff --git a/content/shell/test_runner/web_frame_test_client.cc b/content/shell/test_runner/web_frame_test_client.cc
index ac85df245e22584c5628b14d64a80034f98aec02..1f83572f715674d47e972b3c091a9f77aa8389e2 100644
--- a/content/shell/test_runner/web_frame_test_client.cc
+++ b/content/shell/test_runner/web_frame_test_client.cc
@@ -10,6 +10,7 @@
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
+#include "content/renderer/render_frame_impl.h"
 #include "content/shell/test_runner/accessibility_controller.h"
 #include "content/shell/test_runner/event_sender.h"
 #include "content/shell/test_runner/mock_color_chooser.h"
@@ -44,21 +45,20 @@ namespace test_runner {
 
 namespace {
 
-void PrintFrameDescription(WebTestDelegate* delegate, blink::WebFrame* frame) {
-  std::string name8 = frame->uniqueName().utf8();
+void PrintFrameDescription(WebTestDelegate* delegate,
+                           blink::WebLocalFrame* frame) {
+  const std::string& name =
+      content::RenderFrameImpl::FromWebFrame(frame)->unique_name();
   if (frame == frame->view()->mainFrame()) {
-    if (!name8.length()) {
-      delegate->PrintMessage("main frame");
-      return;
-    }
-    delegate->PrintMessage(std::string("main frame \"") + name8 + "\"");
+    DCHECK(name.empty());
+    delegate->PrintMessage("main frame");
     return;
   }
-  if (!name8.length()) {
+  if (name.empty()) {
     delegate->PrintMessage("frame (anonymous)");
     return;
   }
-  delegate->PrintMessage(std::string("frame \"") + name8 + "\"");
+  delegate->PrintMessage(std::string("frame \"") + name + "\"");
 }
 
 void PrintFrameuserGestureStatus(WebTestDelegate* delegate,