cc: Delete ContextProvider::MakeGrContextCurrent.

cc/resources/raster_worker_pool.cc

 // Copyright 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 "cc/resources/raster_worker_pool.h"
 
 #include "base/debug/trace_event_synthetic_delay.h"
 #include "base/json/json_writer.h"
 #include "base/metrics/histogram.h"
 #include "base/values.h"
@@ skipping 598 matching lines @@
     internal::RasterWorkerPoolTask* task) const {
   return
       raster_tasks_required_for_activation_.find(task) !=
       raster_tasks_required_for_activation_.end();
 }
 
 void RasterWorkerPool::RunGpuRasterTasks(const RasterTaskVector& tasks) {
   if (tasks.empty())
     return;
 
-  context_provider_->MakeGrContextCurrent();
-
   GrContext* gr_context = context_provider_->GrContext();
   // TODO(alokp): Implement TestContextProvider::GrContext().
   if (gr_context)
     gr_context->resetContext();
 
   for (RasterTaskVector::const_iterator it = tasks.begin();
        it != tasks.end(); ++it) {
     internal::RasterWorkerPoolTask* task = it->get();
     DCHECK(task->use_gpu_rasterization());
 
@@ skipping 99 matching lines @@
 
     internal::GraphNode* decode_node = CreateGraphNodeForTask(
         decode_task, priority, graph);
     decode_node->add_dependent(raster_node);
   }
 
   return raster_node;
 }
 
 }  // namespace cc