[inspector] added missing test for console methods

src/inspector/v8-console.cc

 // Copyright 2016 the V8 project 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 "src/inspector/v8-console.h"
 
 #include "src/base/macros.h"
 #include "src/inspector/injected-script.h"
 #include "src/inspector/inspected-context.h"
 #include "src/inspector/string-util.h"
@@ skipping 348 matching lines @@
                    String16::fromInteger(stackTrace->topLineNumber());
     }
   } else {
     identifier = title + "@";
   }
 
   v8::Local<v8::Map> countMap;
   if (!helper.privateMap("V8Console#countMap").ToLocal(&countMap)) return;
   int32_t count = helper.getIntFromMap(countMap, identifier, 0) + 1;
   helper.setIntOnMap(countMap, identifier, count);
-  helper.reportCallWithArgument(ConsoleAPIType::kCount,
-                                title + ": " + String16::fromInteger(count));
+  String16 countString = String16::fromInteger(count);
+  helper.reportCallWithArgument(
+      ConsoleAPIType::kCount,
+      title.isEmpty() ? countString : (title + ": " + countString));
 }
 
 void V8Console::assertCallback(
     const v8::FunctionCallbackInfo<v8::Value>& info) {
   ConsoleHelper helper(info);
   if (helper.firstArgToBoolean(false)) return;
 
   std::vector<v8::Local<v8::Value>> arguments;
   for (int i = 1; i < info.Length(); ++i) arguments.push_back(info[i]);
   if (info.Length() < 2)
@@ skipping 560 matching lines @@
                          ->GetOwnPropertyDescriptor(
                              m_context, v8::Local<v8::String>::Cast(name))
                          .ToLocal(&descriptor);
       DCHECK(success);
       USE(success);
     }
   }
 }
 
 }  // namespace v8_inspector