[Extensions Cleanup] Remove ExecuteCodeFunction::resource_ member

It's only used in a single method. Just make it a function-local.

Bug: None
Change-Id: I0ebcc1f9a6ff8d724490e2e41aa7c4fe35096f86
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2518196
Auto-Submit: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Karan Bhatia <karandeepb@chromium.org>
Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824809}

extensions/browser/api/execute_code_function.cc

@@ -14,6 +14,7 @@
 #include "extensions/browser/load_and_localize_file.h"
 #include "extensions/common/error_utils.h"
 #include "extensions/common/extension.h"
+#include "extensions/common/extension_resource.h"
 
 namespace {
 
@@ -165,8 +166,8 @@ ExtensionFunction::ResponseAction ExecuteCodeFunction::Run() {
 
 bool ExecuteCodeFunction::LoadFile(const std::string& file,
                                    std::string* error) {
-  resource_ = extension()->GetResource(file);
-  if (resource_.extension_root().empty() || resource_.relative_path().empty()) {
+  ExtensionResource resource = extension()->GetResource(file);
+  if (resource.extension_root().empty() || resource.relative_path().empty()) {
     *error = kNoCodeOrFileToExecuteError;
     return false;
   }
@@ -178,9 +179,9 @@ bool ExecuteCodeFunction::LoadFile(const std::string& file,
       (ShouldInsertCSS() || ShouldRemoveCSS()) && !extension()->id().empty();
 
   LoadAndLocalizeResource(
-      *extension(), resource_, might_require_localization,
+      *extension(), resource, might_require_localization,
       base::BindOnce(&ExecuteCodeFunction::DidLoadAndLocalizeFile, this,
-                     resource_.relative_path().AsUTF8Unsafe()));
+                     resource.relative_path().AsUTF8Unsafe()));
 
   return true;
 }

extensions/browser/api/execute_code_function.h

@@ -88,10 +88,6 @@ class ExecuteCodeFunction : public ExtensionFunction {
   // failure and sets |error|.
   bool Execute(const std::string& code_string, std::string* error);
 
-  // Contains extension resource built from path of file which is
-  // specified in JSON arguments.
-  ExtensionResource resource_;
-
   // The URL of the file being injected into the page, in the
   // chrome-extension: scheme.
   GURL script_url_;