[jumbo] drop using statement from header file

This fixes the following jumbo build error:

In file included from gen/third_party/WebKit/Source/platform/blink_platform_unittests_sources_jumbo_3.cc:26:
In file included from ./../../third_party/WebKit/Source/platform/graphics/paint/DrawingRecorderTest.cpp:8:
../../third_party/WebKit/Source/platform/graphics/paint/PaintControllerTest.h:19:23: error: target of using declaration conflicts with declaration already in scope
using blink::testing::DefaultPaintChunkProperties;
                      ^
../../third_party/WebKit/Source/platform/testing/PaintPropertyTestHelpers.h:29:36: note: target of using declaration
static inline PaintChunkProperties DefaultPaintChunkProperties() {
                                   ^
./../../third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositorTest.cpp:43:22: note: conflicting declaration
PaintChunkProperties DefaultPaintChunkProperties() {
                     ^
1 error generated.

Followup to https://chromium-review.googlesource.com/c/chromium/src/+/922391

TBR=chrishtr@chromium.org

Bug: 811269
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Icb472581bb3b9fc46c82d21b0566572b61732876
Reviewed-on: https://chromium-review.googlesource.com/924863
Commit-Queue: Mostyn Bramley-Moore <mostynb@vewd.com>
Reviewed-by: Mostyn Bramley-Moore <mostynb@vewd.com>
Cr-Commit-Position: refs/heads/master@{#537559}

third_party/WebKit/Source/platform/graphics/paint/PaintControllerTest.cpp

@@ -532,7 +532,7 @@ TEST_P(PaintControllerTest, UpdateClip) {
   {
     if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled()) {
       PaintChunk::Id id(first, kClipType);
-      PaintChunkProperties properties = DefaultPaintChunkProperties();
+      PaintChunkProperties properties = testing::DefaultPaintChunkProperties();
       properties.property_tree_state.SetClip(clip.get());
       GetPaintController().UpdateCurrentPaintChunkProperties(id, properties);
     }
@@ -594,7 +594,7 @@ TEST_P(PaintControllerTest, UpdateClip) {
   {
     if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled()) {
       PaintChunk::Id id(second, kClipType);
-      PaintChunkProperties properties = DefaultPaintChunkProperties();
+      PaintChunkProperties properties = testing::DefaultPaintChunkProperties();
       properties.property_tree_state.SetClip(clip2.get());
 
       GetPaintController().UpdateCurrentPaintChunkProperties(id, properties);
@@ -831,7 +831,7 @@ TEST_P(PaintControllerTest, CachedSubsequenceForcePaintChunk) {
   GraphicsContext context(GetPaintController());
 
   FakeDisplayItemClient root("root");
-  auto root_properties = DefaultPaintChunkProperties();
+  auto root_properties = testing::DefaultPaintChunkProperties();
   PaintChunk::Id root_id(root, DisplayItem::kCaret);
   // Record a first chunk with backface_hidden == false
   GetPaintController().UpdateCurrentPaintChunkProperties(root_id,
@@ -841,7 +841,7 @@ TEST_P(PaintControllerTest, CachedSubsequenceForcePaintChunk) {
   FakeDisplayItemClient container("container");
   {
     // Record a second chunk with backface_hidden == true
-    auto container_properties = DefaultPaintChunkProperties();
+    auto container_properties = testing::DefaultPaintChunkProperties();
     container_properties.backface_hidden = true;
     PaintChunk::Id container_id(container, DisplayItem::kCaret);
 
@@ -887,8 +887,10 @@ TEST_P(PaintControllerTest, CachedSubsequenceSwapOrder) {
   FakeDisplayItemClient content2("content2", LayoutRect(100, 200, 50, 200));
   GraphicsContext context(GetPaintController());
 
-  PaintChunkProperties container1_properties = DefaultPaintChunkProperties();
-  PaintChunkProperties container2_properties = DefaultPaintChunkProperties();
+  PaintChunkProperties container1_properties =
+      testing::DefaultPaintChunkProperties();
+  PaintChunkProperties container2_properties =
+      testing::DefaultPaintChunkProperties();
 
   {
     if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled()) {
@@ -1152,8 +1154,10 @@ TEST_P(PaintControllerTest, UpdateSwapOrderCrossingChunks) {
   FakeDisplayItemClient content2("content2", LayoutRect(100, 200, 50, 200));
   GraphicsContext context(GetPaintController());
 
-  PaintChunkProperties container1_properties = DefaultPaintChunkProperties();
-  PaintChunkProperties container2_properties = DefaultPaintChunkProperties();
+  PaintChunkProperties container1_properties =
+      testing::DefaultPaintChunkProperties();
+  PaintChunkProperties container2_properties =
+      testing::DefaultPaintChunkProperties();
 
   {
     if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled()) {
@@ -1287,13 +1291,15 @@ TEST_P(PaintControllerTest, CachedNestedSubsequenceUpdate) {
   GraphicsContext context(GetPaintController());
 
   PaintChunkProperties container1_background_properties =
-      DefaultPaintChunkProperties();
-  PaintChunkProperties content1_properties = DefaultPaintChunkProperties();
+      testing::DefaultPaintChunkProperties();
+  PaintChunkProperties content1_properties =
+      testing::DefaultPaintChunkProperties();
   PaintChunkProperties container1_foreground_properties =
-      DefaultPaintChunkProperties();
+      testing::DefaultPaintChunkProperties();
   PaintChunkProperties container2_background_properties =
-      DefaultPaintChunkProperties();
-  PaintChunkProperties content2_properties = DefaultPaintChunkProperties();
+      testing::DefaultPaintChunkProperties();
+  PaintChunkProperties content2_properties =
+      testing::DefaultPaintChunkProperties();
 
   {
     if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled()) {
@@ -1778,7 +1784,7 @@ TEST_P(PaintControllerTest, SmallPaintControllerHasOnePaintChunk) {
 
   if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled()) {
     GetPaintController().UpdateCurrentPaintChunkProperties(
-        WTF::nullopt, DefaultPaintChunkProperties());
+        WTF::nullopt, testing::DefaultPaintChunkProperties());
   }
   GraphicsContext context(GetPaintController());
   DrawRect(context, client, kBackgroundType, FloatRect(0, 0, 100, 100));

third_party/WebKit/Source/platform/graphics/paint/PaintControllerTest.h

@@ -16,8 +16,6 @@ namespace blink {
 
 class GraphicsContext;
 
-using blink::testing::DefaultPaintChunkProperties;
-
 class PaintControllerTestBase : public ::testing::Test {
  public:
   PaintControllerTestBase()
@@ -48,7 +46,7 @@ class PaintControllerTestBase : public ::testing::Test {
   void InitRootChunk() {
     if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled()) {
       GetPaintController().UpdateCurrentPaintChunkProperties(
-          root_paint_chunk_id_, DefaultPaintChunkProperties());
+          root_paint_chunk_id_, testing::DefaultPaintChunkProperties());
     }
   }