Coverity: Fix a few pass-by-values.

content/public/browser/gpu_data_manager.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_
 #define CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_
 #pragma once
 
 #include "content/common/content_export.h"
 #include "content/public/common/gpu_feature_type.h"
 
 class FilePath;
 
 namespace base {
 class ListValue;
 }
 
 namespace content {
 
 class GpuDataManagerObserver;
 struct GPUInfo;
 
-// This class lives on the UI thread. Only methods that expliclity state that
+// This class lives on the UI thread. Only methods that explicitly state that
 // they can be called on other threads are thread-safe.
 class GpuDataManager {
  public:
   // Getter for the singleton.
   CONTENT_EXPORT static GpuDataManager* GetInstance();
 
   // Can be called on any thread.
   virtual GpuFeatureType GetGpuFeatureType() = 0;
 
   // Gives the new feature flags.  This is always called on the UI thread.
@@ skipping 11 matching lines @@
 
   // Requests complete GPUinfo if it has not already been requested
   virtual void RequestCompleteGpuInfoIfNeeded() = 0;
 
   virtual bool IsCompleteGPUInfoAvailable() const = 0;
 
   // Returns true if the software rendering should currently be used.
   virtual bool ShouldUseSoftwareRendering() = 0;
 
   // Register a path to the SwiftShader software renderer.
-  virtual void RegisterSwiftShaderPath(FilePath path) = 0;
+  virtual void RegisterSwiftShaderPath(const FilePath& path) = 0;
 
   virtual const base::ListValue& GetLogMessages() const = 0;
 
   // Registers/unregister |observer|.
   virtual void AddObserver(GpuDataManagerObserver* observer) = 0;
   virtual void RemoveObserver(GpuDataManagerObserver* observer) = 0;
 
  protected:
   virtual ~GpuDataManager() {}
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_GPU_DATA_MANAGER_H_