Update from https://crrev.com/320343

gpu/command_buffer/client/gles2_implementation.h

Index: gpu/command_buffer/client/gles2_implementation.h
diff --git a/gpu/command_buffer/client/gles2_implementation.h b/gpu/command_buffer/client/gles2_implementation.h
index 1ffdf9100e8928204e1091bddab47163b9347c7e..39b587021a320cc22c05072265561eee72bec689 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -560,6 +560,7 @@ class GLES2_IMPL_EXPORT GLES2Implementation
 
   // Helpers for query functions.
   bool GetHelper(GLenum pname, GLint* params);
+  GLuint GetBoundBufferHelper(GLenum target);
   bool GetBooleanvHelper(GLenum pname, GLboolean* params);
   bool GetBufferParameterivHelper(GLenum target, GLenum pname, GLint* params);
   bool GetFloatvHelper(GLenum pname, GLfloat* params);
@@ -659,6 +660,13 @@ class GLES2_IMPL_EXPORT GLES2Implementation
   void FailGLError(GLenum /* error */) { }
 #endif
 
+  void RemoveMappedBufferRangeByTarget(GLenum target);
+  void RemoveMappedBufferRangeById(GLuint buffer);
+  void ClearMappedBufferRangeMap();
+
+  void DrawElementsImpl(GLenum mode, GLsizei count, GLenum type,
+                        const void* indices, const char* func_name);
+
   GLES2Util util_;
   GLES2CmdHelper* helper_;
   TransferBufferInterface* transfer_buffer_;
@@ -767,6 +775,10 @@ class GLES2_IMPL_EXPORT GLES2Implementation
   typedef std::map<const void*, MappedBuffer> MappedBufferMap;
   MappedBufferMap mapped_buffers_;
 
+  // TODO(zmo): Consolidate |mapped_buffers_| and |mapped_buffer_range_map_|.
+  typedef base::hash_map<GLuint, MappedBuffer> MappedBufferRangeMap;
+  MappedBufferRangeMap mapped_buffer_range_map_;
+
   typedef std::map<const void*, MappedTexture> MappedTextureMap;
   MappedTextureMap mapped_textures_;