[chrome/browser/extensions] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.cc

Index: chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.cc
diff --git a/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.cc b/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.cc
index 9c77870764b610705a63016e726baa5e1ba0341b..5dc5b11c622a1330cc1e50f2cfe3b17606084ba0 100644
--- a/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.cc
+++ b/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.cc
@@ -4,6 +4,7 @@
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
+#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.h"
 #include "chrome/common/extensions/chrome_utility_extensions_messages.h"
@@ -14,7 +15,7 @@
 using content::BrowserThread;
 
 ImageWriterUtilityClient::ImageWriterUtilityClient()
-    : message_loop_proxy_(base::MessageLoopProxy::current()) {}
+    : thread_task_runner_(base::ThreadTaskRunnerHandle::Get()) {}
 ImageWriterUtilityClient::~ImageWriterUtilityClient() {}
 
 void ImageWriterUtilityClient::Write(const ProgressCallback& progress_callback,
@@ -32,7 +33,7 @@ void ImageWriterUtilityClient::Write(const ProgressCallback& progress_callback,
 
   if (!Send(new ChromeUtilityMsg_ImageWriter_Write(source, target))) {
     DLOG(ERROR) << "Unable to send Write message to Utility Process.";
-    message_loop_proxy_->PostTask(
+    thread_task_runner_->PostTask(
         FROM_HERE, base::Bind(error_callback_, "IPC communication failed"));
   }
 }
@@ -52,7 +53,7 @@ void ImageWriterUtilityClient::Verify(const ProgressCallback& progress_callback,
 
   if (!Send(new ChromeUtilityMsg_ImageWriter_Verify(source, target))) {
     DLOG(ERROR) << "Unable to send Verify message to Utility Process.";
-    message_loop_proxy_->PostTask(
+    thread_task_runner_->PostTask(
         FROM_HERE, base::Bind(error_callback_, "IPC communication failed"));
   }
 }
@@ -62,7 +63,7 @@ void ImageWriterUtilityClient::Cancel(const CancelCallback& cancel_callback) {
 
   if (!utility_process_host_) {
     // If we haven't connected, there is nothing to cancel.
-    message_loop_proxy_->PostTask(FROM_HERE, cancel_callback);
+    thread_task_runner_->PostTask(FROM_HERE, cancel_callback);
     return;
   }
 
@@ -105,12 +106,12 @@ void ImageWriterUtilityClient::StartHost() {
 }
 
 void ImageWriterUtilityClient::OnProcessCrashed(int exit_code) {
-  message_loop_proxy_->PostTask(
+  thread_task_runner_->PostTask(
       FROM_HERE, base::Bind(error_callback_, "Utility process crashed."));
 }
 
 void ImageWriterUtilityClient::OnProcessLaunchFailed() {
-  message_loop_proxy_->PostTask(
+  thread_task_runner_->PostTask(
       FROM_HERE, base::Bind(error_callback_, "Process launch failed."));
 }
 
@@ -136,26 +137,26 @@ bool ImageWriterUtilityClient::Send(IPC::Message* msg) {
 
 void ImageWriterUtilityClient::OnWriteImageSucceeded() {
   if (!success_callback_.is_null()) {
-    message_loop_proxy_->PostTask(FROM_HERE, success_callback_);
+    thread_task_runner_->PostTask(FROM_HERE, success_callback_);
   }
 }
 
 void ImageWriterUtilityClient::OnWriteImageCancelled() {
   if (!cancel_callback_.is_null()) {
-    message_loop_proxy_->PostTask(FROM_HERE, cancel_callback_);
+    thread_task_runner_->PostTask(FROM_HERE, cancel_callback_);
   }
 }
 
 void ImageWriterUtilityClient::OnWriteImageFailed(const std::string& message) {
   if (!error_callback_.is_null()) {
-    message_loop_proxy_->PostTask(FROM_HERE,
+    thread_task_runner_->PostTask(FROM_HERE,
                                   base::Bind(error_callback_, message));
   }
 }
 
 void ImageWriterUtilityClient::OnWriteImageProgress(int64 progress) {
   if (!progress_callback_.is_null()) {
-    message_loop_proxy_->PostTask(FROM_HERE,
+    thread_task_runner_->PostTask(FROM_HERE,
                                   base::Bind(progress_callback_, progress));
   }
 }