Remove the renderer shared context from the compositor share group.

content/renderer/render_thread_impl.cc

 // Copyright (c) 2012 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/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 429 matching lines @@
   DCHECK_EQ(pieces.size(), static_cast<size_t>(gfx::BufferFormat::LAST) + 1);
   for (size_t i = 0; i < pieces.size(); ++i) {
     unsigned number = 0;
     bool succeed = base::StringToUint(pieces[i], &number);
     DCHECK(succeed);
     vector->push_back(number);
   }
 }
 
 std::unique_ptr<WebGraphicsContext3DCommandBufferImpl> CreateOffscreenContext(
-    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host) {
+    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host,
+    bool share_resources) {
   DCHECK(gpu_channel_host);
   // This is used to create a few different offscreen contexts:
   // - The shared main thread context (offscreen) used by blink for canvas.
   // - The worker context (offscreen) used for GPU raster and video decoding.
   // This is for an offscreen context, so the default framebuffer doesn't need
   // alpha, depth, stencil, antialiasing.
   gpu::gles2::ContextCreationAttribHelper attributes;
   attributes.alpha_size = -1;
   attributes.depth_size = 0;
   attributes.stencil_size = 0;
   attributes.samples = 0;
   attributes.sample_buffers = 0;
   attributes.bind_generates_resource = false;
   attributes.lose_context_when_out_of_memory = true;
-  bool share_resources = true;
-  bool automatic_flushes = false;
+  constexpr bool automatic_flushes = false;
   return base::WrapUnique(new WebGraphicsContext3DCommandBufferImpl(
       gpu::kNullSurfaceHandle,
       GURL("chrome://gpu/RenderThreadImpl::CreateOffscreenContext3d"),
       gpu_channel_host.get(), attributes, gfx::PreferIntegratedGpu,
       share_resources, automatic_flushes, nullptr));
 }
 
 }  // namespace
 
 // For measuring memory usage after each task. Behind a command line flag.
@@ skipping 1022 matching lines @@
           GL_NO_ERROR)
     return shared_main_thread_contexts_;
 
   scoped_refptr<gpu::GpuChannelHost> gpu_channel_host(EstablishGpuChannelSync(
       CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE));
   if (!gpu_channel_host) {
     shared_main_thread_contexts_ = nullptr;
     return nullptr;
   }
 
+  constexpr bool share_resources = false;
   shared_main_thread_contexts_ = new ContextProviderCommandBuffer(
-      CreateOffscreenContext(std::move(gpu_channel_host)),
+      CreateOffscreenContext(std::move(gpu_channel_host), share_resources),
       gpu::SharedMemoryLimits(), RENDERER_MAINTHREAD_CONTEXT);
   if (!shared_main_thread_contexts_->BindToCurrentThread())
     shared_main_thread_contexts_ = nullptr;
   return shared_main_thread_contexts_;
 }
 
 #if defined(OS_ANDROID)
 
 scoped_refptr<StreamTextureFactory> RenderThreadImpl::GetStreamTexureFactory() {
   DCHECK(IsMainThread());
@@ skipping 493 matching lines @@
       return shared_worker_context_provider_;
   }
 
   scoped_refptr<gpu::GpuChannelHost> gpu_channel_host(EstablishGpuChannelSync(
       CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE));
   if (!gpu_channel_host) {
     shared_worker_context_provider_ = nullptr;
     return shared_worker_context_provider_;
   }
 
+  constexpr bool share_resources = true;
   shared_worker_context_provider_ = new ContextProviderCommandBuffer(
-      CreateOffscreenContext(std::move(gpu_channel_host)),
+      CreateOffscreenContext(std::move(gpu_channel_host), share_resources),
       gpu::SharedMemoryLimits(), RENDER_WORKER_CONTEXT);
   if (!shared_worker_context_provider_->BindToCurrentThread())
     shared_worker_context_provider_ = nullptr;
   if (shared_worker_context_provider_)
     shared_worker_context_provider_->SetupLock();
   return shared_worker_context_provider_;
 }
 
 void RenderThreadImpl::SampleGamepads(blink::WebGamepads* data) {
   blink_platform_impl_->sampleGamepads(*data);
@@ skipping 79 matching lines @@
 }
 
 void RenderThreadImpl::PendingRenderFrameConnect::OnConnectionError() {
   size_t erased =
       RenderThreadImpl::current()->pending_render_frame_connects_.erase(
           routing_id_);
   DCHECK_EQ(1u, erased);
 }
 
 }  // namespace content