Update Google+ integration.

[UPDATED]   Google+ SDK to 1.1.0.

External/google-plus-ios-sdk/OpenSource/GTL/GTLObject.m

@@ -516,14 +516,11 @@ static NSMutableDictionary *gKindMap = nil;
                 defaultClass:(Class)defaultClass
                   surrogates:(NSDictionary *)surrogates
                batchClassMap:(NSDictionary *)batchClassMap {
-  if ([json isEqual:[NSNull null]]) {
+  if ([json count] == 0 || [json isEqual:[NSNull null]]) {
     // no actual result, such as the response from a delete
     return nil;
   }
 
-  GTL_ASSERT([json count] != 0, @"Creating object from empty json");
-  if ([json count] == 0) return nil;
-
   // Determine the class to instantiate, based on the original fetch
   // request or by looking up "kind" string from the registration at
   // +load time of GTLObject subclasses
@@ -629,9 +626,13 @@ static NSMutableDictionary *gArrayPropertyToClassMapCache = nil;
 @end
 
 @implementation GTLCollectionObject
-
 // Subclasses must implement the items method dynamically.
 
+- (void)dealloc {
+  [identifierMap_ release];
+  [super dealloc];
+}
+
 - (id)itemAtIndex:(NSUInteger)idx {
   NSArray *items = [self performSelector:@selector(items)];
   if (idx < [items count]) {
@@ -640,6 +641,36 @@ static NSMutableDictionary *gArrayPropertyToClassMapCache = nil;
   return nil;
 }
 
+- (id)objectAtIndexedSubscript:(NSInteger)idx {
+  if (idx >= 0) {
+    return [self itemAtIndex:(NSUInteger)idx];
+  }
+  return nil;
+}
+
+- (id)itemForIdentifier:(NSString *)key {
+  if (identifierMap_ == nil) {
+    NSArray *items = [self performSelector:@selector(items)];
+    NSMutableDictionary *dict =
+      [NSMutableDictionary dictionaryWithCapacity:[items count]];
+    for (id item in items) {
+      id identifier = [item valueForKey:@"identifier"];
+      if (identifier != nil && identifier != [NSNull null]) {
+        if ([dict objectForKey:identifier] == nil) {
+          [dict setObject:item forKey:identifier];
+        }
+      }
+    }
+    identifierMap_ = [dict copy];
+  }
+  return [identifierMap_ objectForKey:key];
+}
+
+- (void)resetIdentifierMap {
+  [identifierMap_ release];
+  identifierMap_ = nil;
+}
+
 // NSFastEnumeration protocol
 - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state
                                   objects:(id *)stackbuf