static: update search placeholder for symbol search

Fixes golang/go#47842

Change-Id: I4b125b67c396704e3a65a35a7fc963d47f942e02
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/346090
Trust: Jamal Carvalho <jamal@golang.org>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>
diff --git a/static/frontend/homepage/homepage.tmpl b/static/frontend/homepage/homepage.tmpl
index e5056ba..5f32c1e 100644
--- a/static/frontend/homepage/homepage.tmpl
+++ b/static/frontend/homepage/homepage.tmpl
@@ -28,15 +28,27 @@
           data-test-id="homepage-search"
           id="AutoComplete"
           role="textbox"
-          aria-label="Search for Go packages"
+          {{- if .Experiments.IsActive "symbol-search" -}}
+            aria-label="Search packages or symbols"
+          {{else}}
+            aria-label="Search for Go packages"
+          {{- end -}}
           type="search"
           name="q"
-          placeholder="Search for Go packages"
+          {{- if .Experiments.IsActive "symbol-search" -}}
+            placeholder="Search packages or symbols"
+          {{else}}
+            placeholder="Search for Go packages"
+          {{- end -}}
           autocapitalize="off"
           autocomplete="off"
           autocorrect="off"
           spellcheck="false"
-          title="Search for Go packages"
+          {{- if .Experiments.IsActive "symbol-search" -}}
+            title="Search packages or symbols"
+          {{else}}
+            title="Search for Go packages"
+          {{- end -}}
           autofocus="true">
         <button type="submit" class="go-Button">Search</button>
       </form>
diff --git a/static/shared/header/header.tmpl b/static/shared/header/header.tmpl
index 84fa27a..4c3d024 100644
--- a/static/shared/header/header.tmpl
+++ b/static/shared/header/header.tmpl
@@ -92,7 +92,8 @@
     {{end}}
     <input name="q" class="go-Input js-searchFocus" aria-label="Search for a package" type="search"
         autocapitalize="off" autocomplete="off" autocorrect="off" spellcheck="false"
-        placeholder="Search for a package" value="{{.Query}}" />
+        {{- if .Experiments.IsActive "symbol-search" -}} placeholder="Search packages or symbols"
+        {{- else -}} placeholder="Search for a package"{{- end -}} value="{{.Query}}" />
     <button class="go-Button go-Button--inverted" aria-label="Submit search">
       <img
         class="go-Icon"