[Paint Preview] static_library -> source_set

This might save on binary size, but regardless it is good to change.
This was made a static_library at project start and should have been a
source_set.

Change-Id: I925848a98d299c106e007f1770d54b984f414e46
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2570239
Auto-Submit: Calder Kitagawa <ckitagawa@chromium.org>
Commit-Queue: Mehran Mahmoudi <mahmoudi@chromium.org>
Reviewed-by: Mehran Mahmoudi <mahmoudi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833300}

components/paint_preview/renderer/BUILD.gn

@@ -4,52 +4,52 @@
 
 import("//testing/test.gni")
 
-if (!is_ios) {
-  static_library("renderer") {
-    sources = [
-      "paint_preview_recorder_impl.cc",
-      "paint_preview_recorder_impl.h",
-      "paint_preview_recorder_utils.cc",
-      "paint_preview_recorder_utils.h",
-    ]
-
-    deps = [
-      "//base",
-      "//cc/paint",
-      "//content/public/renderer",
-      "//mojo/public/cpp/base",
-      "//third_party/blink/public:blink_headers",
-      "//third_party/blink/public/common",
-    ]
-
-    public_deps = [
-      "//components/paint_preview/common",
-      "//components/paint_preview/common/mojom",
-    ]
-  }
-
-  source_set("unit_tests") {
-    testonly = true
-
-    sources = [ "paint_preview_recorder_utils_unittest.cc" ]
-
-    deps = [
-      ":renderer",
-      "//base",
-      "//base/test:test_support",
-      "//cc/paint",
-      "//components/paint_preview/common:test_utils",
-      "//testing/gmock",
-      "//testing/gtest",
-    ]
-  }
-
-  test("paint_preview_renderer_unit_tests") {
-    deps = [
-      ":unit_tests",
-      "//base",
-      "//base/test:test_support",
-      "//components/test:run_all_unittests",
-    ]
-  }
+assert(!is_ios, "Paint Previews are not supported on iOS.")
+
+source_set("renderer") {
+  sources = [
+    "paint_preview_recorder_impl.cc",
+    "paint_preview_recorder_impl.h",
+    "paint_preview_recorder_utils.cc",
+    "paint_preview_recorder_utils.h",
+  ]
+
+  deps = [
+    "//base",
+    "//cc/paint",
+    "//content/public/renderer",
+    "//mojo/public/cpp/base",
+    "//third_party/blink/public:blink_headers",
+    "//third_party/blink/public/common",
+  ]
+
+  public_deps = [
+    "//components/paint_preview/common",
+    "//components/paint_preview/common/mojom",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+
+  sources = [ "paint_preview_recorder_utils_unittest.cc" ]
+
+  deps = [
+    ":renderer",
+    "//base",
+    "//base/test:test_support",
+    "//cc/paint",
+    "//components/paint_preview/common:test_utils",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+}
+
+test("paint_preview_renderer_unit_tests") {
+  deps = [
+    ":unit_tests",
+    "//base",
+    "//base/test:test_support",
+    "//components/test:run_all_unittests",
+  ]
 }