Revert "Issue #1684 - Remove global UA override preference and supporting code."

This reverts commit 18df01eb5498c954044f96c346026da0238d2e61.

Backed out for devtools breakage.

4 files changed, 34 insertions, 1 deletions

diff --git a/netwerk/base/RequestContextService.cpp b/netwerk/base/RequestContextService.cpp
index 362c9ea47..7edda1845 100644
--- a/netwerk/base/RequestContextService.cpp
+++ b/netwerk/base/RequestContextService.cpp
@@ -33,6 +33,7 @@ private:
   char mCID[NSID_LENGTH];
   Atomic<uint32_t>       mBlockingTransactionCount;
   nsAutoPtr<SpdyPushCache> mSpdyCache;
+  nsCString mUserAgentOverride;
 };
 
 NS_IMPL_ISUPPORTS(RequestContext, nsIRequestContext)
@@ -94,6 +95,21 @@ RequestContext::GetID(nsID *outval)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+RequestContext::GetUserAgentOverride(nsACString& aUserAgentOverride)
+{
+  aUserAgentOverride = mUserAgentOverride;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+RequestContext::SetUserAgentOverride(const nsACString& aUserAgentOverride)
+{
+  mUserAgentOverride = aUserAgentOverride;
+  return NS_OK;
+}
+
+
 //nsIRequestContextService
 RequestContextService *RequestContextService::sSelf = nullptr;
 
diff --git a/netwerk/base/nsIRequestContext.idl b/netwerk/base/nsIRequestContext.idl
index a58275216..b40ba7d18 100644
--- a/netwerk/base/nsIRequestContext.idl
+++ b/netwerk/base/nsIRequestContext.idl
@@ -24,7 +24,7 @@ class SpdyPushCache;
  *
  * This used to be known as nsILoadGroupConnectionInfo and nsISchedulingContext.
  */
-[scriptable, uuid(a1b5c243-ab9b-41a7-a208-f8a9c0c43dc2)]
+[scriptable, uuid(658e3e6e-8633-4b1a-8d66-fa9f72293e63)]
 interface nsIRequestContext : nsISupports
 {
   /**
@@ -58,6 +58,10 @@ interface nsIRequestContext : nsISupports
    */
   [noscript] attribute SpdyPushCachePtr spdyPushCache;
 
+  /**
+   * This holds a cached value of the user agent override.
+   */
+  [noscript] attribute ACString userAgentOverride;
 };
 
 /**
diff --git a/netwerk/protocol/http/nsHttpHandler.cpp b/netwerk/protocol/http/nsHttpHandler.cpp
index 0ae589151..7a29e041b 100644
--- a/netwerk/protocol/http/nsHttpHandler.cpp
+++ b/netwerk/protocol/http/nsHttpHandler.cpp
@@ -685,6 +685,11 @@ nsHttpHandler::BuildAppVersion()
 const nsAFlatCString &
 nsHttpHandler::UserAgent()
 {
+    if (mUserAgentOverride) {
+        LOG(("using general.useragent.override : %s\n", mUserAgentOverride.get()));
+        return mUserAgentOverride;
+    }
+
     if (mUserAgentIsDirty) {
         BuildUserAgent();
         mUserAgentIsDirty = false;
@@ -986,6 +991,13 @@ nsHttpHandler::PrefsChanged(nsIPrefBranch *prefs, const char *pref)
         mUserAgentIsDirty = true;
     }
 
+    // general.useragent.override
+    if (PREF_CHANGED(UA_PREF("override"))) {
+        prefs->GetCharPref(UA_PREF("override"),
+                           getter_Copies(mUserAgentOverride));
+        mUserAgentIsDirty = true;
+    }
+
     //
     // HTTP options
     //
diff --git a/netwerk/protocol/http/nsHttpHandler.h b/netwerk/protocol/http/nsHttpHandler.h
index 549b82205..4f632e078 100644
--- a/netwerk/protocol/http/nsHttpHandler.h
+++ b/netwerk/protocol/http/nsHttpHandler.h
@@ -506,6 +506,7 @@ private:
     nsCString      mDeviceModelId;
 
     nsCString      mUserAgent;
+    nsXPIDLCString mUserAgentOverride;
     bool           mUserAgentIsDirty; // true if mUserAgent should be rebuilt
     bool           mAcceptLanguagesIsDirty;