Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/task_manager/worker_resource_provider.cc

Index: chrome/browser/task_manager/worker_resource_provider.cc
diff --git a/chrome/browser/task_manager/worker_resource_provider.cc b/chrome/browser/task_manager/worker_resource_provider.cc
index ae86370fc3dc7a05676349d3f3348f5646261e0b..7aee45690913e711d116d7b3bdcb5a3a4873826c 100644
--- a/chrome/browser/task_manager/worker_resource_provider.cc
+++ b/chrome/browser/task_manager/worker_resource_provider.cc
@@ -83,9 +83,9 @@ SharedWorkerResource::SharedWorkerResource(
     : process_id_(process_id),
       routing_id_(routing_id),
       handle_(process_handle) {
-  title_ = UTF8ToUTF16(url.spec());
+  title_ = base::UTF8ToUTF16(url.spec());
   if (!name.empty())
-    title_ += ASCIIToUTF16(" (") + name + ASCIIToUTF16(")");
+    title_ += base::ASCIIToUTF16(" (") + name + base::ASCIIToUTF16(")");
 }
 
 SharedWorkerResource::~SharedWorkerResource() {