Add memory limits struct to in-process context

Add SharedMemoryLimits struct to in-process command buffer
context. Pick a reasonable value for the reclaim limit for
synchronous compositor

BUG=402086

Review URL: https://codereview.chromium.org/455083002

Cr-Commit-Position: refs/heads/master@{#290764}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290764 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 28 insertions, 9 deletions

diff --git a/webkit/common/gpu/context_provider_in_process.cc b/webkit/common/gpu/context_provider_in_process.cc
index 3785d38a..e4ca1d8 100644
--- a/webkit/common/gpu/context_provider_in_process.cc
+++ b/webkit/common/gpu/context_provider_in_process.cc
@@ -110,6 +110,13 @@ bool ContextProviderInProcess::BindToCurrentThread() {
 
 void ContextProviderInProcess::InitializeCapabilities() {
   capabilities_.gpu = context3d_->GetImplementation()->capabilities();
+
+  size_t mapped_memory_limit = context3d_->GetMappedMemoryLimit();
+  capabilities_.max_transfer_buffer_usage_bytes =
+      mapped_memory_limit ==
+              WebGraphicsContext3DInProcessCommandBufferImpl::kNoLimit
+          ? std::numeric_limits<size_t>::max()
+          : mapped_memory_limit;
 }
 
 cc::ContextProvider::Capabilities
diff --git a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
index afd843a..2dc7dc8 100644
--- a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
+++ b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc
@@ -118,6 +118,10 @@ WebGraphicsContext3DInProcessCommandBufferImpl::
     ~WebGraphicsContext3DInProcessCommandBufferImpl() {
 }
 
+size_t WebGraphicsContext3DInProcessCommandBufferImpl::GetMappedMemoryLimit() {
+  return context_->GetMappedMemoryLimit();
+}
+
 bool WebGraphicsContext3DInProcessCommandBufferImpl::MaybeInitializeGL() {
   if (initialized_)
     return true;
@@ -135,15 +139,17 @@ bool WebGraphicsContext3DInProcessCommandBufferImpl::MaybeInitializeGL() {
     // will need to be lost either when the first context requesting the
     // discrete GPU is created, or the last one is destroyed.
     gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
-    context_.reset(GLInProcessContext::Create(NULL, /* service */
-                                              NULL, /* surface */
-                                              is_offscreen_,
-                                              window_,
-                                              gfx::Size(1, 1),
-                                              NULL, /* share_context */
-                                              share_resources_,
-                                              attribs_,
-                                              gpu_preference));
+    context_.reset(GLInProcessContext::Create(
+        NULL, /* service */
+        NULL, /* surface */
+        is_offscreen_,
+        window_,
+        gfx::Size(1, 1),
+        NULL, /* share_context */
+        share_resources_,
+        attribs_,
+        gpu_preference,
+        ::gpu::GLInProcessContextSharedMemoryLimits()));
   }
 
   if (context_) {
diff --git a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h
index 54d7f17..0248dff 100644
--- a/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h
+++ b/webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h
@@ -36,6 +36,10 @@ namespace gpu {
 class WEBKIT_GPU_EXPORT WebGraphicsContext3DInProcessCommandBufferImpl
     : public WebGraphicsContext3DImpl {
  public:
+  enum MappedMemoryReclaimLimit {
+    kNoLimit = 0,
+  };
+
   static scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
       CreateViewContext(
           const blink::WebGraphicsContext3D::Attributes& attributes,
@@ -54,6 +58,8 @@ class WEBKIT_GPU_EXPORT WebGraphicsContext3DInProcessCommandBufferImpl
 
   virtual ~WebGraphicsContext3DInProcessCommandBufferImpl();
 
+  size_t GetMappedMemoryLimit();
+
   //----------------------------------------------------------------------
   // WebGraphicsContext3D methods
   virtual bool makeContextCurrent();