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

content/shell/shell_browser_main.cc

Index: content/shell/shell_browser_main.cc
diff --git a/content/shell/shell_browser_main.cc b/content/shell/shell_browser_main.cc
index 499b9b3ddada2646fa48be79dbd18d1ae6a05d84..d8fabe959a96e30851a5337444cee82a8cd7d845 100644
--- a/content/shell/shell_browser_main.cc
+++ b/content/shell/shell_browser_main.cc
@@ -13,6 +13,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/sys_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/utf_string_conversions.h"
 #include "content/public/browser/browser_main_runner.h"
 #include "content/shell/shell_switches.h"
 #include "content/shell/webkit_test_runner_host.h"
@@ -21,7 +22,7 @@
 
 namespace {
 
-GURL GetURLForLayoutTest(const char* test_name,
+GURL GetURLForLayoutTest(const std::string& test_name,
                          bool* enable_pixel_dumping,
                          std::string* expected_pixel_hash) {
   // A test name is formated like file:///path/to/test'--pixel-test'pixelhash
@@ -63,6 +64,21 @@ GURL GetURLForLayoutTest(const char* test_name,
   return test_url;
 }
 
+bool GetNextTest(const CommandLine::StringVector& args,
+                 size_t* position,
+                 std::string* test) {
+  if (*position >= args.size())
+    return false;
+  if (args[*position] == FILE_PATH_LITERAL("-"))
+    return !!std::getline(std::cin, *test, '\n');
+#if defined(OS_WIN)
+  *test = WideToUTF8(args[(*position)++]);
+#else
+  *test = args[(*position)++];
+#endif
+  return true;
+}
+
 }  // namespace
 
 // Main routine for running as the Browser process.
@@ -85,20 +101,20 @@ int ShellBrowserMain(const content::MainFunctionParams& parameters) {
 
   if (layout_test_mode) {
     content::WebKitTestController test_controller;
+    std::string test_string;
+    CommandLine::StringVector args =
+        CommandLine::ForCurrentProcess()->GetArgs();
+    size_t command_line_position = 0;
 
-    char test_string[2048];
 #if defined(OS_ANDROID)
     std::cout << "#READY\n";
     std::cout.flush();
 #endif
 
-    while (fgets(test_string, sizeof(test_string), stdin)) {
-      char *new_line_position = strchr(test_string, '\n');
-      if (new_line_position)
-        *new_line_position = '\0';
-      if (test_string[0] == '\0')
+    while (GetNextTest(args, &command_line_position, &test_string)) {
+      if (test_string.empty())
         continue;
-      if (!strcmp(test_string, "QUIT"))
+      if (test_string == "QUIT")
         break;
 
       bool enable_pixel_dumps;