Add missing (and remove superfluous) 'explicit' from constructors.

content/common/gpu/gpu_command_buffer_stub.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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/hash.h"
 #include "base/shared_memory.h"
@@ skipping 26 matching lines @@
 #include "content/common/gpu/stream_texture_manager_android.h"
 #endif
 
 namespace content {
 namespace {
 
 // The GpuCommandBufferMemoryTracker class provides a bridge between the
 // ContextGroup's memory type managers and the GpuMemoryManager class.
 class GpuCommandBufferMemoryTracker : public gpu::gles2::MemoryTracker {
  public:
-  GpuCommandBufferMemoryTracker(GpuChannel* channel) :
+  explicit GpuCommandBufferMemoryTracker(GpuChannel* channel) :
       tracking_group_(channel->gpu_channel_manager()->gpu_memory_manager()->
           CreateTrackingGroup(channel->renderer_pid(), this)) {
   }
 
   void TrackMemoryAllocatedChange(size_t old_size,
                                   size_t new_size,
                                   gpu::gles2::MemoryTracker::Pool pool) {
     tracking_group_->TrackMemoryAllocatedChange(
         old_size, new_size, pool);
   }
@@ skipping 807 matching lines @@
       route_id_, allocation.renderer_allocation));
   // This can be called outside of OnMessageReceived, so the context needs to be
   // made current before calling methods on the surface.
   if (!surface_ || !MakeCurrent())
     return;
   surface_->SetFrontbufferAllocation(
       allocation.browser_allocation.suggest_have_frontbuffer);
 }
 
 }  // namespace content