[content shell] add support for getting tests from the command line.

base/command_line_unittest.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 <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 15 matching lines @@
   const CommandLine::CharType* argv[] = {
       FILE_PATH_LITERAL("program"),
       FILE_PATH_LITERAL("--foo="),
       FILE_PATH_LITERAL("-bAr"),
       FILE_PATH_LITERAL("-spaetzel=pierogi"),
       FILE_PATH_LITERAL("-baz"),
       FILE_PATH_LITERAL("flim"),
       FILE_PATH_LITERAL("--other-switches=--dog=canine --cat=feline"),
       FILE_PATH_LITERAL("-spaetzle=Crepe"),
       FILE_PATH_LITERAL("-=loosevalue"),
+      FILE_PATH_LITERAL("-"),
       FILE_PATH_LITERAL("FLAN"),
       FILE_PATH_LITERAL("a"),
       FILE_PATH_LITERAL("--input-translation=45--output-rotation"),
       FILE_PATH_LITERAL("--"),
       FILE_PATH_LITERAL("--"),
       FILE_PATH_LITERAL("--not-a-switch"),
       FILE_PATH_LITERAL("\"in the time of submarines...\""),
       FILE_PATH_LITERAL("unquoted arg-with-space")};
   CommandLine cl(arraysize(argv), argv);
 
@@ skipping 22 matching lines @@
 
   EXPECT_EQ("Crepe", cl.GetSwitchValueASCII("spaetzle"));
   EXPECT_EQ("", cl.GetSwitchValueASCII("Foo"));
   EXPECT_EQ("", cl.GetSwitchValueASCII("bar"));
   EXPECT_EQ("", cl.GetSwitchValueASCII("cruller"));
   EXPECT_EQ("--dog=canine --cat=feline", cl.GetSwitchValueASCII(
       "other-switches"));
   EXPECT_EQ("45--output-rotation", cl.GetSwitchValueASCII("input-translation"));
 
   const CommandLine::StringVector& args = cl.GetArgs();
-  ASSERT_EQ(7U, args.size());
+  ASSERT_EQ(8U, args.size());
 
   std::vector<CommandLine::StringType>::const_iterator iter = args.begin();
   EXPECT_EQ(FILE_PATH_LITERAL("flim"), *iter);
   ++iter;
+  EXPECT_EQ(FILE_PATH_LITERAL("-"), *iter);
+  ++iter;
   EXPECT_EQ(FILE_PATH_LITERAL("FLAN"), *iter);
   ++iter;
   EXPECT_EQ(FILE_PATH_LITERAL("a"), *iter);
   ++iter;
   EXPECT_EQ(FILE_PATH_LITERAL("--"), *iter);
   ++iter;
   EXPECT_EQ(FILE_PATH_LITERAL("--not-a-switch"), *iter);
   ++iter;
   EXPECT_EQ(FILE_PATH_LITERAL("\"in the time of submarines...\""), *iter);
   ++iter;
@@ skipping 195 matching lines @@
 }
 #endif
 
 // Calling Init multiple times should not modify the previous CommandLine.
 TEST(CommandLineTest, Init) {
   CommandLine* initial = CommandLine::ForCurrentProcess();
   EXPECT_FALSE(CommandLine::Init(0, NULL));
   CommandLine* current = CommandLine::ForCurrentProcess();
   EXPECT_EQ(initial, current);
 }