Give SxS distribution its own registration GUIDs.

chrome/installer/util/google_chrome_distribution.cc

Index: chrome/installer/util/google_chrome_distribution.cc
diff --git a/chrome/installer/util/google_chrome_distribution.cc b/chrome/installer/util/google_chrome_distribution.cc
index 2ae5338f23f94f1dcc0c4bf8494e6a612f873f3d..3d87f608164aa3d34c0440d873df37e80ad80596 100644
--- a/chrome/installer/util/google_chrome_distribution.cc
+++ b/chrome/installer/util/google_chrome_distribution.cc
@@ -35,6 +35,8 @@ namespace {
 
 const wchar_t kChromeGuid[] = L"{8A69D345-D564-463c-AFF1-A69D9E530F96}";
 const wchar_t kBrowserAppId[] = L"Chrome";
+const wchar_t kBrowserProgIdPrefix[] = L"ChromeHTML";
+const wchar_t kBrowserProgIdDesc[] = L"Chrome HTML Document";
 const wchar_t kCommandExecuteImplUuid[] =
     L"{5C65F4B0-3651-4514-B207-D10CB699B14B}";
 
@@ -156,6 +158,14 @@ string16 GoogleChromeDistribution::GetBaseAppId() {
   return kBrowserAppId;
 }
 
+string16 GoogleChromeDistribution::GetBrowserProgIdPrefix() {
+  return kBrowserProgIdPrefix;
+}
+
+string16 GoogleChromeDistribution::GetBrowserProgIdDesc() {
+  return kBrowserProgIdDesc;
+}
+
 string16 GoogleChromeDistribution::GetInstallSubDir() {
   string16 sub_dir(installer::kGoogleChromeInstallSubDir1);
   sub_dir.append(L"\\");