Remove the current /prefetch switch when relaunching Chrome.

chrome/common/switch_utils_unittest.cc

Index: chrome/common/switch_utils_unittest.cc
diff --git a/chrome/common/switch_utils_unittest.cc b/chrome/common/switch_utils_unittest.cc
index 20da818f816a9dd617d591811a56a0ebf29e3800..0b02bc3748f4e1bcfd3125e1f1e5604e3a70a29d 100644
--- a/chrome/common/switch_utils_unittest.cc
+++ b/chrome/common/switch_utils_unittest.cc
@@ -11,7 +11,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(SwitchUtilsTest, RemoveSwitches) {
-  const base::CommandLine::CharType* argv[] = {
+  static const base::CommandLine::CharType* argv[] = {
       FILE_PATH_LITERAL("program"),
       FILE_PATH_LITERAL("--app=http://www.google.com/"),
       FILE_PATH_LITERAL("--force-first-run"),
@@ -53,4 +53,43 @@ TEST(SwitchUtilsTest, RemoveSwitchesFromString) {
   EXPECT_TRUE(cmd_line.HasSwitch("foo"));
   EXPECT_TRUE(cmd_line.HasSwitch("bar"));
 }
+
+TEST(SwitchUtilsTest, RemovePrefetchSwitch) {
+  static const base::CommandLine::CharType* argv[] = {
+      FILE_PATH_LITERAL("program"),
+      FILE_PATH_LITERAL("--foo"),
+      FILE_PATH_LITERAL("/prefetch:1"),
+      FILE_PATH_LITERAL("--bar")};
+  base::CommandLine cmd_line(arraysize(argv), argv);
+  EXPECT_FALSE(cmd_line.GetCommandLineString().empty());
+
+  std::map<std::string, base::CommandLine::StringType> switches =
+      cmd_line.GetSwitches();
+  EXPECT_EQ(3U, switches.size());
+
+  switches::RemoveSwitchesForAutostart(&switches);
+  EXPECT_EQ(2U, switches.size());
+  EXPECT_TRUE(cmd_line.HasSwitch("foo"));
+  EXPECT_TRUE(cmd_line.HasSwitch("bar"));
+}
+
+TEST(SwitchUtilsTest, RemovePrefetchSwitchAndNormalSwitch) {
+  static const base::CommandLine::CharType* argv[] = {
+      FILE_PATH_LITERAL("program"),
+      FILE_PATH_LITERAL("--foo"),
+      FILE_PATH_LITERAL("/prefetch:1"),
+      FILE_PATH_LITERAL("--force-first-run"),
+      FILE_PATH_LITERAL("--bar")};
+  base::CommandLine cmd_line(arraysize(argv), argv);
+  EXPECT_FALSE(cmd_line.GetCommandLineString().empty());
+
+  std::map<std::string, base::CommandLine::StringType> switches =
+      cmd_line.GetSwitches();
+  EXPECT_EQ(4U, switches.size());
+
+  switches::RemoveSwitchesForAutostart(&switches);
+  EXPECT_EQ(2U, switches.size());
+  EXPECT_TRUE(cmd_line.HasSwitch("foo"));
+  EXPECT_TRUE(cmd_line.HasSwitch("bar"));
+}
 #endif