Make GLES2Implementation use a larger chunk size for mapping functions.

gpu/command_buffer/client/gles2_implementation.cc

 // Copyright (c) 2011 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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "../client/gles2_implementation.h"
 
 #include <set>
 #include <queue>
@@ skipping 544 matching lines @@
     debug_ = CommandLine::ForCurrentProcess()->HasSwitch(
         switches::kEnableGPUClientLogging);
   });
 
   // Allocate space for simple GL results.
   result_buffer_ = transfer_buffer;
   result_shm_offset_ = 0;
   memset(&reserved_ids_, 0, sizeof(reserved_ids_));
 
   mapped_memory_.reset(new MappedMemoryManager(helper_));
+  SetSharedMemoryChunkSizeMultiple(1024 * 1024 * 2);
 
   if (share_resources) {
     if (!bind_generates_resource) {
       buffer_id_handler_.reset(
           new StrictSharedIdHandler(this, id_namespaces::kBuffers));
       framebuffer_id_handler_.reset(
           new StrictSharedIdHandler(this, id_namespaces::kFramebuffers));
       renderbuffer_id_handler_.reset(
           new StrictSharedIdHandler(this, id_namespaces::kRenderbuffers));
       program_and_shader_id_handler_.reset(
@@ skipping 59 matching lines @@
       reserved_ids_[1]));
 #endif
 }
 
 GLES2Implementation::~GLES2Implementation() {
 #if defined(GLES2_SUPPORT_CLIENT_SIDE_ARRAYS)
   DeleteBuffers(arraysize(reserved_ids_), &reserved_ids_[0]);
 #endif
 }
 
+void GLES2Implementation::SetSharedMemoryChunkSizeMultiple(
+    unsigned int multiple) {
+  mapped_memory_->set_chunk_size_multiple(multiple);
+}
+
 void GLES2Implementation::FreeUnusedSharedMemory() {
   mapped_memory_->FreeUnused();
 }
 
 void GLES2Implementation::WaitForCmd() {
   TRACE_EVENT0("gpu", "GLES2::WaitForCmd");
   helper_->CommandBufferHelper::Finish();
 }
 
 GLenum GLES2Implementation::GetError() {
@@ skipping 1998 matching lines @@
 
 void GLES2Implementation::DestroyStreamTextureCHROMIUM(GLuint texture) {
   GPU_CLIENT_LOG("[" << this << "] DestroyStreamTextureCHROMIUM("
       << texture << ")");
   TRACE_EVENT0("gpu", "GLES2::DestroyStreamTextureCHROMIUM");
   helper_->DestroyStreamTextureCHROMIUM(texture);
 }
 
 }  // namespace gles2
 }  // namespace gpu