Work around wrong UA sniffing by Yahoo! JAPAN

webkit/glue/webkit_glue.cc

Index: webkit/glue/webkit_glue.cc
diff --git a/webkit/glue/webkit_glue.cc b/webkit/glue/webkit_glue.cc
index 5e47fe4ee986e7a00b176f8b2b7f24db7f4e6fb7..ef2702af8e0320f98cfa411e66339699f9d0dd99 100644
--- a/webkit/glue/webkit_glue.cc
+++ b/webkit/glue/webkit_glue.cc
@@ -350,8 +350,8 @@ class UserAgentState {
 
  private:
   mutable std::string user_agent_;
-  // The UA string when we're pretending to be Mac Safari.
-  mutable std::string mimic_mac_safari_user_agent_;
+  // The UA string when we're pretending to be Mac Safari or Win Firefox.
+  mutable std::string user_agent_for_spoofing_hack_;
 
   mutable bool user_agent_requested_;
   bool user_agent_is_overridden_;
@@ -384,6 +384,44 @@ void UserAgentState::Set(const std::string& user_agent, bool overriding) {
   user_agent_ = user_agent;
 }
 
+bool IsMicrosoftSiteThatNeedsSpoofingForSilverlight(const GURL& url) {
+#if defined(OS_MACOSX)
+  // The landing page for updating Silverlight gives a confusing experience
+  // in browsers that Silverlight doesn't officially support; spoof as
+  // Safari to reduce the chance that users won't complete updates.
+  // Should be removed if the sniffing is removed: http://crbug.com/88211
+  if (url.host() == "www.microsoft.com" &&
+      StartsWithASCII(url.path(), "/getsilverlight", false)) {
+    return true;
+  }
+#endif
+  return false;
+}
+
+bool IsYahooSiteThatNeedsSpoofingForSilverlight(const GURL& url) {
+  // The following Yahoo! JAPAN pages erroneously judge that Silverlight does
+  // not support Chromium. Until the pages are fixed, spoof the UA.
+  // http://crbug.com/104426
+  if (url.host() == "headlines.yahoo.co.jp" &&
+      StartsWithASCII(url.path(), "/videonews/", true)) {
+    return true;
+  }
+#if defined(OS_MACOSX)
+  if ((url.host() == "downloads.yahoo.co.jp" &&
+      StartsWithASCII(url.path(), "/docs/silverlight/", true)) ||
+      url.host() == "gyao.yahoo.co.jp") {
+    return true;
+  }
+#elif defined(OS_WIN)
+  if ((url.host() == "weather.yahoo.co.jp" &&
+        StartsWithASCII(url.path(), "/weather/zoomradar/", true)) ||
+      url.host() == "promotion.shopping.yahoo.co.jp") {
+    return true;
+  }
+#endif
+  return false;
+}
+
 const std::string& UserAgentState::Get(const GURL& url) const {
   base::AutoLock auto_lock(lock_);
   user_agent_requested_ = true;
@@ -392,20 +430,22 @@ const std::string& UserAgentState::Get(const GURL& url) const {
 
   // Workarounds for sites that use misguided UA sniffing.
   if (!user_agent_is_overridden_) {
+    if (IsMicrosoftSiteThatNeedsSpoofingForSilverlight(url) ||
+        IsYahooSiteThatNeedsSpoofingForSilverlight(url)) {
+      if (user_agent_for_spoofing_hack_.empty()) {
 #if defined(OS_MACOSX)
-    if (url.host() == "www.microsoft.com" &&
-        StartsWithASCII(url.path(), "/getsilverlight", false)) {
-      // The landing page for updating Silverlight gives a confusing experience
-      // in browsers that Silverlight doesn't officially support; spoof as
-      // Safari to reduce the chance that users won't complete updates.
-      // Should be removed if the sniffing is removed: http://crbug.com/88211
-      if (mimic_mac_safari_user_agent_.empty()) {
-        mimic_mac_safari_user_agent_ =
-            BuildUserAgentFromProduct("Version/5.0.4 Safari/533.20.27");
+        user_agent_for_spoofing_hack_ =
+            BuildUserAgentFromProduct("Version/5.1.1 Safari/534.51.22");
+#elif defined(OS_WIN)
+        // Pretend to be Firefox. Silverlight doesn't support Win Safari.
+        base::StringAppendF(
+            &user_agent_for_spoofing_hack_,
+            "Mozilla/5.0 (%s) Gecko/20100101 Firefox/8.0",
+            webkit_glue::BuildOSCpuInfo().c_str());
+#endif
       }
-      return mimic_mac_safari_user_agent_;
+      return user_agent_for_spoofing_hack_;
     }
-#endif
   }
 
   return user_agent_;