Workaround Linux AMD driver bug where TEXTURE_MAX_ANISOTROPY init value is incorrect.

gpu/command_buffer/service/texture_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 GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 141 matching lines @@
   }
 
   // Whether a particular level/face is cleared.
   bool IsLevelCleared(GLenum target, GLint level) const;
 
   // Whether the texture has been defined
   bool IsDefined() const {
     return estimated_size() > 0;
   }
 
+  // Initialize TEXTURE_MAX_ANISOTROPY to 1 if we haven't done so yet.
+  void InitTextureMaxAnisotropyIfNeeded(GLenum target);
+
  private:
   friend class MailboxManager;
   friend class MailboxManagerTest;
   friend class TextureManager;
   friend class TextureRef;
   friend class TextureTestHelper;
 
   ~Texture();
   void AddTextureRef(TextureRef* ref);
   void RemoveTextureRef(TextureRef* ref, bool have_context);
@@ skipping 200 matching lines @@
 
   // Whether or not this texture has images.
   bool has_images_;
 
   // Size in bytes this texture is assumed to take in memory.
   uint32 estimated_size_;
 
   // Cache of the computed CanRenderCondition flag.
   CanRenderCondition can_render_condition_;
 
+  // Whether we have initialized TEXTURE_MAX_ANISOTROPY to 1.
+  bool texture_max_anisotropy_initialized_;
+
   DISALLOW_COPY_AND_ASSIGN(Texture);
 };
 
 // This class represents a texture in a client context group. It's mostly 1:1
 // with a client id, though it can outlive the client id if it's still bound to
 // a FBO or another context when destroyed.
 // Multiple TextureRef can point to the same texture with cross-context sharing.
 class GPU_EXPORT TextureRef : public base::RefCounted<TextureRef> {
  public:
   TextureRef(TextureManager* manager, GLuint client_id, Texture* texture);
@@ skipping 400 matching lines @@
  private:
   DecoderTextureState* texture_state_;
   base::TimeTicks begin_time_;
   DISALLOW_COPY_AND_ASSIGN(ScopedTextureUploadTimer);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_