exhibit 1: explicit null checks

chrome/browser/extensions/api/extension_action/extension_actions_api.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/api/extension_action/extension_actions_api.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/string_number_conversions.h"
@@ skipping 55 matching lines @@
   if (!base::Base64Decode(str, &raw_str))
     return false;
   IPC::Message bitmap_pickle(raw_str.data(), raw_str.size());
   PickleIterator iter(bitmap_pickle);
   return IPC::ReadParam(&bitmap_pickle, &iter, bitmap);
 }
 
 // Conversion function for reading/writing to storage.
 std::string ImageToString(const gfx::Image& image) {
   IPC::Message bitmap_pickle;
-  IPC::WriteParam(&bitmap_pickle, image.AsBitmap());
+  IPC::WriteParam(&bitmap_pickle,
+                  image.IsEmpty() ? SkBitmap() : *image.ToSkBitmap());
   std::string raw_str(static_cast<const char*>(bitmap_pickle.data()),
                       bitmap_pickle.size());
   std::string base64_str;
   if (!base::Base64Encode(raw_str, &base64_str))
     return std::string();
   return base64_str;
 }
 
 // Set |action|'s default values to those specified in |dict|.
 void SetDefaultsFromValue(const base::DictionaryValue* dict,
@@ skipping 422 matching lines @@
 bool ExtensionActionGetBadgeBackgroundColorFunction::RunExtensionAction() {
   ListValue* list = new ListValue();
   SkColor color = extension_action_->GetBadgeBackgroundColor(tab_id_);
   list->Append(Value::CreateIntegerValue(SkColorGetR(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetG(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetB(color)));
   list->Append(Value::CreateIntegerValue(SkColorGetA(color)));
   SetResult(list);
   return true;
 }