Aura-Mus: Fix high-DPI gutter

ui/aura/mus/window_tree_client_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/mus/window_tree_client.h"
 
 #include <stdint.h>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 86 matching lines @@
 // Note that this implicitly casts arguments to the aura storage type, int64_t.
 std::vector<uint8_t> ConvertToPropertyTransportValue(int64_t value) {
   return mojo::ConvertTo<std::vector<uint8_t>>(value);
 }
 
 }  // namespace
 
 using WindowTreeClientWmTest = test::AuraMusWmTestBase;
 using WindowTreeClientClientTest = test::AuraMusClientTestBase;
 
-// WindowTreeClientWmTest with --enable-surface-synchronization.
-class WindowTreeClientWmTestSurfaceSync : public WindowTreeClientWmTest {
+class WindowTreeClientWmTestSurfaceSync
+    : public WindowTreeClientWmTest,
+      public ::testing::WithParamInterface<bool> {
  public:
   WindowTreeClientWmTestSurfaceSync() {}
   ~WindowTreeClientWmTestSurfaceSync() override {}
 
   // WindowTreeClientWmTest:
   void SetUp() override {
-    base::CommandLine::ForCurrentProcess()->AppendSwitch(
-        cc::switches::kEnableSurfaceSynchronization);
+    if (GetParam()) {
+      base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+          switches::kForceDeviceScaleFactor, "2");
+    }
     WindowTreeClientWmTest::SetUp();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClientWmTestSurfaceSync);
 };
 
 // WindowTreeClientWmTest with --force-device-scale-factor=2.
 class WindowTreeClientWmTestHighDPI : public WindowTreeClientWmTest {
  public:
@@ skipping 70 matching lines @@
   ASSERT_NE(nullptr, window_mus);
   EXPECT_TRUE(window_mus->GetLocalSurfaceId().is_valid());
 
   // Reverting the change should also revert the cc::LocalSurfaceId.
   ASSERT_TRUE(window_tree()->AckSingleChangeOfType(WindowTreeChangeType::BOUNDS,
                                                    false));
   EXPECT_EQ(original_bounds, window.bounds());
   EXPECT_FALSE(window_mus->GetLocalSurfaceId().is_valid());
 }
 
+INSTANTIATE_TEST_CASE_P(/* no prefix */,
+                        WindowTreeClientWmTestSurfaceSync,
+                        ::testing::Bool());
+
 // Verifies that a ClientSurfaceEmbedder is created for a window once it has
 // a bounds, and a valid FrameSinkId.
-TEST_F(WindowTreeClientWmTestSurfaceSync,
+TEST_P(WindowTreeClientWmTestSurfaceSync,
        ClientSurfaceEmbedderOnValidEmbedding) {
   Window window(nullptr);
   // TOP_LEVEL_IN_WM and EMBED_IN_OWNER windows allocate cc::LocalSurfaceIds
   // when their sizes change.
   window.SetProperty(aura::client::kEmbedType,
                      aura::client::WindowEmbedType::EMBED_IN_OWNER);
   window.Init(ui::LAYER_NOT_DRAWN);
 
   // The window will allocate a cc::LocalSurfaceId once it has a bounds.
   WindowMus* window_mus = WindowMus::Get(&window);
   ASSERT_NE(nullptr, window_mus);
   EXPECT_FALSE(window_mus->GetLocalSurfaceId().is_valid());
-  const gfx::Rect new_bounds(gfx::Rect(0, 0, 100, 100));
+  gfx::Rect new_bounds(gfx::Rect(0, 0, 100, 100));
   ASSERT_NE(new_bounds, window.bounds());
   window.SetBounds(new_bounds);
   EXPECT_EQ(new_bounds, window.bounds());
   EXPECT_TRUE(window_mus->GetLocalSurfaceId().is_valid());
 
   // An ClientSurfaceEmbedder isn't created UNTIL the window has a bounds and
   // a valid FrameSinkId.
   WindowPortMus* window_port_mus = WindowPortMus::Get(&window);
   ASSERT_NE(nullptr, window_port_mus);
   EXPECT_EQ(nullptr, window_port_mus->client_surface_embedder());
 
   // Now that the window has a valid FrameSinkId, it can embed the client in a
   // CompositorFrame.
   window_tree_client()->OnFrameSinkIdAllocated(server_id(&window),
                                                cc::FrameSinkId(1, 1));
   ClientSurfaceEmbedder* client_surface_embedder =
       window_port_mus->client_surface_embedder();
   ASSERT_NE(nullptr, client_surface_embedder);
 
   // Until the fallback surface fills the window, we will have gutter.
-  ui::Layer* right_gutter = client_surface_embedder->RightGutterForTesting();
-  ASSERT_NE(nullptr, right_gutter);
-  EXPECT_EQ(gfx::Rect(100, 100), right_gutter->bounds());
-  // We don't have a bottom gutter if the fallback surface size is (0, 0) as the
-  // right gutter will fill the whole area.
-  ASSERT_EQ(nullptr, client_surface_embedder->BottomGutterForTesting());
+  {
+    ui::Layer* right_gutter = client_surface_embedder->RightGutterForTesting();
+    ASSERT_NE(nullptr, right_gutter);
+    EXPECT_EQ(gfx::Rect(100, 100), right_gutter->bounds());
+    // We don't have a bottom gutter if the fallback surface size is (0, 0) as
+    // the right gutter will fill the whole area.
+    ASSERT_EQ(nullptr, client_surface_embedder->BottomGutterForTesting());
+  }
 
   // When a SurfaceInfo arrives from the window server, we use it as the
   // fallback SurfaceInfo. Here we issue the PrimarySurfaceInfo back to the
   // client lib. This should cause the gutter to go away, eliminating overdraw.
   window_tree_client()->OnWindowSurfaceChanged(
       server_id(&window), window_port_mus->PrimarySurfaceInfoForTesting());
 
   // The gutter is gone.
   ASSERT_EQ(nullptr, client_surface_embedder->BottomGutterForTesting());
   ASSERT_EQ(nullptr, client_surface_embedder->RightGutterForTesting());
+
+  // Resize again: we should have gutter.
+  new_bounds.SetRect(0, 0, 150, 150);
+  ASSERT_NE(new_bounds, window.bounds());
+  window.SetBounds(new_bounds);
+  ASSERT_NE(nullptr, client_surface_embedder->BottomGutterForTesting());
+  ASSERT_NE(nullptr, client_surface_embedder->RightGutterForTesting());
+
+  // Until the fallback surface fills the window, we will have gutter.
+  {
+    ui::Layer* right_gutter = client_surface_embedder->RightGutterForTesting();
+    ASSERT_NE(nullptr, right_gutter);
+    EXPECT_EQ(gfx::Rect(100, 0, 50, 150), right_gutter->bounds());
+
+    ui::Layer* bottom_gutter =
+        client_surface_embedder->BottomGutterForTesting();
+    ASSERT_NE(nullptr, bottom_gutter);
+    EXPECT_EQ(gfx::Rect(0, 100, 100, 50), bottom_gutter->bounds());
+  }
 }
 
 // Verifies that the cc::LocalSurfaceId generated by an embedder changes when
 // the size changes, but not when the position changes.
-TEST_F(WindowTreeClientWmTest, SetBoundsLocalSurfaceIdChanges) {
+TEST_P(WindowTreeClientWmTestSurfaceSync, SetBoundsLocalSurfaceIdChanges) {
   ASSERT_EQ(base::nullopt, window_tree()->last_local_surface_id());
   Window window(nullptr);
   // TOP_LEVEL_IN_WM and EMBED_IN_OWNER windows allocate cc::LocalSurfaceIds
   // when their sizes change.
   window.SetProperty(aura::client::kEmbedType,
                      aura::client::WindowEmbedType::EMBED_IN_OWNER);
   window.Init(ui::LAYER_NOT_DRAWN);
 
   // Resize the window and verify that we've allocated a cc::LocalSurfaceId.
   const gfx::Rect new_bounds(0, 0, 100, 100);
@@ skipping 2164 matching lines @@
   window.Init(ui::LAYER_NOT_DRAWN);
   DeleteWindowTreeClient();
 
   // And it should be possible to create Windows after the WindowTreeClient has
   // been deleted.
   aura::Window window2(nullptr);
   window2.Init(ui::LAYER_NOT_DRAWN);
 }
 
 }  // namespace aura