Add decode() functionality to image elements.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <limits>
@@ skipping 48 matching lines @@
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "services/ui/public/cpp/gpu/context_provider_command_buffer.h"
 #include "third_party/WebKit/public/platform/WebCompositeAndReadbackAsyncCallback.h"
 #include "third_party/WebKit/public/platform/WebCompositorMutatorClient.h"
 #include "third_party/WebKit/public/platform/WebLayoutAndPaintAsyncCallback.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/platform/scheduler/renderer/renderer_scheduler.h"
 #include "third_party/WebKit/public/web/WebKit.h"
 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "third_party/WebKit/public/web/WebSelection.h"
+#include "third_party/skia/include/core/SkImage.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/native_theme/native_theme_switches.h"
 #include "ui/native_theme/overlay_scrollbar_constants_aura.h"
 
 namespace base {
 class Value;
 }
 
 namespace cc {
 class Layer;
@@ skipping 945 matching lines @@
 }
 
 void RenderWidgetCompositor::setBrowserControlsShownRatio(float ratio) {
   layer_tree_host_->SetBrowserControlsShownRatio(ratio);
 }
 
 void RenderWidgetCompositor::setBottomControlsHeight(float height) {
   layer_tree_host_->SetBottomControlsHeight(height);
 }
 
+void RenderWidgetCompositor::requestDecode(
+    sk_sp<SkImage> image,
+    const base::Callback<void(bool)>& callback) {
+  layer_tree_host_->QueueImageDecode(std::move(image), callback);
+
+  // If we're compositing synchronously, the SetNeedsCommit call which will be
+  // issued by |layer_tree_host_| is not going to cause a commit, due to the
+  // fact that this would make layout tests slow and cause flakiness. However,
+  // in this case we actually need a commit to transfer the decode requests to
+  // the impl side. So, force a commit to happen.
+  if (CompositeIsSynchronous()) {
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE, base::Bind(&RenderWidgetCompositor::SynchronouslyComposite,
+                              weak_factory_.GetWeakPtr()));
+  }
+}
+
 void RenderWidgetCompositor::WillBeginMainFrame() {
   delegate_->WillBeginCompositorFrame();
 }
 
 void RenderWidgetCompositor::DidBeginMainFrame() {}
 
 void RenderWidgetCompositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
   compositor_deps_->GetRendererScheduler()->WillBeginFrame(args);
   double frame_time_sec = (args.frame_time - base::TimeTicks()).InSecondsF();
   delegate_->BeginMainFrame(frame_time_sec);
@@ skipping 101 matching lines @@
 void RenderWidgetCompositor::SetContentSourceId(uint32_t id) {
   layer_tree_host_->SetContentSourceId(id);
 }
 
 void RenderWidgetCompositor::SetLocalSurfaceId(
     const cc::LocalSurfaceId& local_surface_id) {
   layer_tree_host_->SetLocalSurfaceId(local_surface_id);
 }
 
 }  // namespace content