WebUI cleanup: Rename IDR_MD_EXTENSIONS_ to IDR_EXTENSIONS_.

This is part of the effort to remove unnecessary "md_" prefixes from various
parts of the WebUI codebase.

Bug: 887150
Change-Id: I5769e7064e8acd359a3293a42a3bded90072d0c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1559460
Auto-Submit: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Reviewed-by: Esmael El-Moslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#649248}

chrome/browser/resources/md_extensions/extensions_resources_vulcanized.grd

@@ -12,9 +12,26 @@
   </outputs>
   <release seq="1">
     <includes>
-      <include name="IDR_MD_EXTENSIONS_VULCANIZED_HTML" file="${root_gen_dir}\chrome\browser\resources\md_extensions\vulcanized.html" use_base_dir="false" flattenhtml="true" allowexternalscript="true" type="BINDATA" compress="gzip" />
-      <include name="IDR_MD_EXTENSIONS_VULCANIZED_P2_HTML" file="${root_gen_dir}\chrome\browser\resources\md_extensions\vulcanized.p2.html" use_base_dir="false" flattenhtml="true" allowexternalscript="true" type="BINDATA" compress="gzip" />
-      <include name="IDR_MD_EXTENSIONS_CRISPER_JS" file="${root_gen_dir}\chrome\browser\resources\md_extensions\crisper.js" use_base_dir="false" flattenhtml="true" type="BINDATA" compress="gzip" />
+      <include name="IDR_EXTENSIONS_VULCANIZED_HTML"
+               file="${root_gen_dir}\chrome\browser\resources\md_extensions\vulcanized.html"
+               use_base_dir="false"
+               flattenhtml="true"
+               allowexternalscript="true"
+               type="BINDATA"
+               compress="gzip" />
+      <include name="IDR_EXTENSIONS_VULCANIZED_P2_HTML"
+               file="${root_gen_dir}\chrome\browser\resources\md_extensions\vulcanized.p2.html"
+               use_base_dir="false"
+               flattenhtml="true"
+               allowexternalscript="true"
+               type="BINDATA"
+               compress="gzip" />
+      <include name="IDR_EXTENSIONS_CRISPER_JS"
+               file="${root_gen_dir}\chrome\browser\resources\md_extensions\crisper.js"
+               use_base_dir="false"
+               flattenhtml="true"
+               type="BINDATA"
+               compress="gzip" />
     </includes>
   </release>
 </grit>

chrome/browser/ui/webui/extensions/extensions_ui.cc

@@ -342,11 +342,11 @@ content::WebUIDataSource* CreateMdExtensionsSource(Profile* profile,
   source->AddString(kLoadTimeClassesKey, GetLoadTimeClasses(in_dev_mode));
 
 #if BUILDFLAG(OPTIMIZE_WEBUI)
-  source->AddResourcePath("crisper.js", IDR_MD_EXTENSIONS_CRISPER_JS);
+  source->AddResourcePath("crisper.js", IDR_EXTENSIONS_CRISPER_JS);
   source->SetDefaultResource(
-      base::FeatureList::IsEnabled(features::kWebUIPolymer2) ?
-          IDR_MD_EXTENSIONS_VULCANIZED_P2_HTML :
-          IDR_MD_EXTENSIONS_VULCANIZED_HTML);
+      base::FeatureList::IsEnabled(features::kWebUIPolymer2)
+          ? IDR_EXTENSIONS_VULCANIZED_P2_HTML
+          : IDR_EXTENSIONS_VULCANIZED_HTML);
   source->UseGzip();
 #else
   // Add all MD Extensions resources.
@@ -354,7 +354,7 @@ content::WebUIDataSource* CreateMdExtensionsSource(Profile* profile,
     source->AddResourcePath(kExtensionsResources[i].name,
                             kExtensionsResources[i].value);
   }
-  source->SetDefaultResource(IDR_MD_EXTENSIONS_EXTENSIONS_HTML);
+  source->SetDefaultResource(IDR_EXTENSIONS_EXTENSIONS_HTML);
 #endif
 
   return source;