Bug 832700 - Add private browsing to b2g, API implementation r=ehsan,smaug

docshell/base/nsDocShell.cpp

@@ -851,6 +851,7 @@ nsDocShell::nsDocShell():
 #endif
     mAffectPrivateSessionLifetime(true),
     mInvisible(false),
+    mHasLoadedNonBlankURI(false),
     mDefaultLoadFlags(nsIRequest::LOAD_NORMAL),
     mFrameType(eFrameTypeRegular),
     mOwnOrContainingAppId(nsIScriptSecurityManager::UNKNOWN_APP_ID),
@@ -1928,6 +1929,10 @@ nsDocShell::SetCurrentURI(nsIURI *aURI, nsIRequest *aRequest,
 
     mCurrentURI = NS_TryToMakeImmutable(aURI);
     
+    if (!NS_IsAboutBlank(mCurrentURI)) {
+      mHasLoadedNonBlankURI = true;
+    }
+
     bool isRoot = false;   // Is this the root docshell
     bool isSubFrame = false;  // Is this a subframe navigation?
 
@@ -2277,6 +2282,15 @@ nsDocShell::SetPrivateBrowsing(bool aUsePrivateBrowsing)
     return NS_OK;
 }
 
+NS_IMETHODIMP
+nsDocShell::GetHasLoadedNonBlankURI(bool* aResult)
+{
+    NS_ENSURE_ARG_POINTER(aResult);
+
+    *aResult = mHasLoadedNonBlankURI;
+    return NS_OK;
+}
+
 NS_IMETHODIMP
 nsDocShell::GetUseRemoteTabs(bool* aUseRemoteTabs)
 {