Make image_decoder a Leaky LazyInstance

chrome/utility/chrome_content_utility_client.h

Index: chrome/utility/chrome_content_utility_client.h
diff --git a/chrome/utility/chrome_content_utility_client.h b/chrome/utility/chrome_content_utility_client.h
index 92e26f7ef7a7e217cbc1251f122e0968317bb590..4dc682efd067719e7ea484e80d44dbd60fb30fa8 100644
--- a/chrome/utility/chrome_content_utility_client.h
+++ b/chrome/utility/chrome_content_utility_client.h
@@ -35,7 +35,7 @@ class ChromeContentUtilityClient : public content::ContentUtilityClient {
   static SkBitmap DecodeImage(const std::vector<unsigned char>& encoded_data,
                               bool shrink_to_fit);
   static void DecodeImageAndSend(const std::vector<unsigned char>& encoded_data,
-                                 bool shrink_to_fit);
+                                 bool shrink_to_fit, int id);
 
   static void set_max_ipc_message_size_for_test(int64_t max_message_size) {
     max_ipc_message_size_ = max_message_size;
@@ -45,9 +45,9 @@ class ChromeContentUtilityClient : public content::ContentUtilityClient {
   // IPC message handlers.
   void OnUnpackWebResource(const std::string& resource_data);
   void OnDecodeImage(const std::vector<unsigned char>& encoded_data,
-                     bool shrink_to_fit);
+                     bool shrink_to_fit, int id);
   void OnRobustJPEGDecodeImage(
-      const std::vector<unsigned char>& encoded_data);
+      const std::vector<unsigned char>& encoded_data, int id);
 
 #if defined(OS_CHROMEOS)
   void OnCreateZipFile(const base::FilePath& src_dir,