Bug 1198387 - Remove use-cache preference and its references. r=mcmanus

modules/libpref/init/all.js

@@ -1252,9 +1252,6 @@ pref("network.http.proxy.version", "1.1");    // default
 // pref("network.http.proxy.version", "1.0"); // uncomment this out in case of problems
                                               // (required if using junkbuster proxy)
 
-// enable caching of http documents
-pref("network.http.use-cache", true);
-
 // this preference can be set to override the socket type used for normal
 // HTTP traffic.  an empty value indicates the normal TCP/IP socket type.
 pref("network.http.default-socket-type", "");

netwerk/protocol/http/nsHttpChannel.cpp

@@ -416,10 +416,6 @@ nsHttpChannel::Connect()
         return NS_ERROR_DOCUMENT_NOT_CACHED;
     }
 
-    if (!gHttpHandler->UseCache()) {
-        return ContinueConnect();
-    }
-
     // open a cache entry for this channel...
     rv = OpenCacheEntry(isHttps);
 

netwerk/protocol/http/nsHttpHandler.cpp

@@ -174,7 +174,6 @@ nsHttpHandler::nsHttpHandler()
     , mProduct("Gecko")
     , mCompatFirefoxEnabled(false)
     , mUserAgentIsDirty(true)
-    , mUseCache(true)
     , mPromptTempRedirect(true)
     , mSendSecureXSiteReferrer(true)
     , mEnablePersistentHttpsCaching(false)
@@ -1154,13 +1153,6 @@ nsHttpHandler::PrefsChanged(nsIPrefBranch *prefs, const char *pref)
             SetAcceptEncodings(acceptEncodings);
     }
 
-    if (PREF_CHANGED(HTTP_PREF("use-cache"))) {
-        rv = prefs->GetBoolPref(HTTP_PREF("use-cache"), &cVar);
-        if (NS_SUCCEEDED(rv)) {
-            mUseCache = cVar;
-        }
-    }
-
     if (PREF_CHANGED(HTTP_PREF("default-socket-type"))) {
         nsXPIDLCString sval;
         rv = prefs->GetCharPref(HTTP_PREF("default-socket-type"),

netwerk/protocol/http/nsHttpHandler.h

@@ -167,7 +167,6 @@ public:
     nsHttpConnectionMgr *ConnMgr()   { return mConnMgr; }
 
     // cache support
-    bool UseCache() const { return mUseCache; }
     uint32_t GenerateUniqueID() { return ++mLastUniqueID; }
     uint32_t SessionStartTime() { return mSessionStartTime; }
 
@@ -458,7 +457,6 @@ private:
     nsXPIDLCString mUserAgentOverride;
     bool           mUserAgentIsDirty; // true if mUserAgent should be rebuilt
 
-    bool           mUseCache;
 
     bool           mPromptTempRedirect;
     // mSendSecureXSiteReferrer: default is false,