Mac: Clean up ifdefs in output surface

content/browser/compositor/gpu_output_surface_mac.mm

+// Copyright 2016 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 "content/browser/compositor/gpu_output_surface_mac.h"
+
+#include "components/display_compositor/compositor_overlay_candidate_validator.h"
+#include "content/browser/gpu/gpu_surface_tracker.h"
+#include "content/common/gpu/client/context_provider_command_buffer.h"
+#include "gpu/GLES2/gl2extchromium.h"
+#include "gpu/ipc/client/gpu_process_hosted_ca_layer_tree_params.h"
+#include "ui/accelerated_widget_mac/accelerated_widget_mac.h"
+#include "ui/base/cocoa/remote_layer_api.h"
+#include "ui/gfx/mac/io_surface.h"
+
+namespace content {
+
+GpuOutputSurfaceMac::GpuOutputSurfaceMac(
+    scoped_refptr<ContextProviderCommandBuffer> context,
+    gpu::SurfaceHandle surface_handle,
+    scoped_refptr<ui::CompositorVSyncManager> vsync_manager,
+    base::SingleThreadTaskRunner* task_runner,
+    std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
+        overlay_candidate_validator,
+    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager)
+    : GpuSurfacelessBrowserCompositorOutputSurface(
+          std::move(context),
+          surface_handle,
+          std::move(vsync_manager),
+          task_runner,
+          std::move(overlay_candidate_validator),
+          GL_TEXTURE_RECTANGLE_ARB,
+          GL_RGBA,
+          gpu_memory_buffer_manager) {}
+
+GpuOutputSurfaceMac::~GpuOutputSurfaceMac() {}
+
+void GpuOutputSurfaceMac::SwapBuffers(cc::CompositorFrame* frame) {
+  GpuSurfacelessBrowserCompositorOutputSurface::SwapBuffers(frame);
+
+  if (should_show_frames_state_ ==
+      SHOULD_NOT_SHOW_FRAMES_NO_SWAP_AFTER_SUSPENDED) {
+    should_show_frames_state_ = SHOULD_SHOW_FRAMES;
+  }
+}
+
+void GpuOutputSurfaceMac::OnGpuSwapBuffersCompleted(
+    const std::vector<ui::LatencyInfo>& latency_info,
+    gfx::SwapResult result,
+    const gpu::GpuProcessHostedCALayerTreeParamsMac* params_mac) {
+  if (should_show_frames_state_ == SHOULD_SHOW_FRAMES) {
+    gfx::AcceleratedWidget native_widget =
+        content::GpuSurfaceTracker::Get()->AcquireNativeWidget(
+            params_mac->surface_handle);
+    ui::AcceleratedWidgetMacGotFrame(
+        native_widget, params_mac->ca_context_id,
+        params_mac->fullscreen_low_power_ca_context_valid,
+        params_mac->fullscreen_low_power_ca_context_id, params_mac->io_surface,
+        params_mac->pixel_size, params_mac->scale_factor, nullptr, nullptr);
+  }
+  GpuSurfacelessBrowserCompositorOutputSurface::OnGpuSwapBuffersCompleted(
+      latency_info, result, params_mac);
+}
+
+void GpuOutputSurfaceMac::SetSurfaceSuspendedForRecycle(bool suspended) {
+  if (suspended) {
+    // It may be that there are frames in-flight from the GPU process back to
+    // the browser. Make sure that these frames are not displayed by ignoring
+    // them in GpuProcessHostUIShim, until the browser issues a SwapBuffers for
+    // the new content.
+    should_show_frames_state_ = SHOULD_NOT_SHOW_FRAMES_SUSPENDED;
+  } else {
+    // Discard the backbuffer before drawing the new frame. This is necessary
+    // only when using a ImageTransportSurfaceFBO with a
+    // CALayerStorageProvider. Discarding the backbuffer results in the next
+    // frame using a new CALayer and CAContext, which guarantees that the
+    // browser will not flash stale content when adding the remote CALayer to
+    // the NSView hierarchy (it could flash stale content because the system
+    // window server is not synchronized with any signals we control or
+    // observe).
+    if (should_show_frames_state_ == SHOULD_NOT_SHOW_FRAMES_SUSPENDED) {
+      DiscardBackbuffer();
+      should_show_frames_state_ =
+          SHOULD_NOT_SHOW_FRAMES_NO_SWAP_AFTER_SUSPENDED;
+    }
+  }
+}
+
+bool GpuOutputSurfaceMac::SurfaceIsSuspendForRecycle() const {
+  return should_show_frames_state_ == SHOULD_NOT_SHOW_FRAMES_SUSPENDED;
+}
+
+}  // namespace content