Move ".crx"/".pem" constants and extension_filenames constants into extensions/common/constants.cc.

chrome/browser/extensions/sandboxed_unpacker_unittest.cc

Index: chrome/browser/extensions/sandboxed_unpacker_unittest.cc
diff --git a/chrome/browser/extensions/sandboxed_unpacker_unittest.cc b/chrome/browser/extensions/sandboxed_unpacker_unittest.cc
index 55fe555191d2f55303d6a5e7bd1296faf1f22cf7..dc1e481ae5ed257bb28ed4e42b0c87d3ba55b3a3 100644
--- a/chrome/browser/extensions/sandboxed_unpacker_unittest.cc
+++ b/chrome/browser/extensions/sandboxed_unpacker_unittest.cc
@@ -97,8 +97,7 @@ class SandboxedUnpackerTest : public testing::Test {
   }
 
   base::FilePath GetInstallPath() {
-    return client_->temp_dir().AppendASCII(
-        extension_filenames::kTempExtensionName);
+    return client_->temp_dir().AppendASCII(filenames::kTempExtensionName);
   }
 
  protected:
@@ -112,7 +111,7 @@ TEST_F(SandboxedUnpackerTest, NoCatalogsSuccess) {
   SetupUnpacker("no_l10n.crx");
   // Check that there is no _locales folder.
   base::FilePath install_path =
-      GetInstallPath().Append(kLocaleFolder);
+      GetInstallPath().Append(filenames::kLocaleFolder);
   EXPECT_FALSE(base::PathExists(install_path));
 }
 
@@ -120,7 +119,7 @@ TEST_F(SandboxedUnpackerTest, WithCatalogsSuccess) {
   SetupUnpacker("good_l10n.crx");
   // Check that there is _locales folder.
   base::FilePath install_path =
-      GetInstallPath().Append(kLocaleFolder);
+      GetInstallPath().Append(filenames::kLocaleFolder);
   EXPECT_TRUE(base::PathExists(install_path));
 }